/usr/bin/java -Xmx16000000000 -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/bench/exp2x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:35:40,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:35:40,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:35:40,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:35:40,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:35:40,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:35:40,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:35:40,839 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 [2021-02-19 17:35:40,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:35:40,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:35:40,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:35:40,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:35:40,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:35:40,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:35:40,868 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:35:40,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:35:40,868 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:35:40,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:35:40,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:35:40,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:35:40,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:35:40,870 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:35:40,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:35:40,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:35:41,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:35:41,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:35:41,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:35:41,103 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:35:41,104 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:35:41,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl [2021-02-19 17:35:41,129 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl' [2021-02-19 17:35:41,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:35:41,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:35:41,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:35:41,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:35:41,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:35:41,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:35:41,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:35:41,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:35:41,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:35:41,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/1) ... [2021-02-19 17:35:41,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:35:41,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:35:41,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:35:41,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:35:41,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (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 [2021-02-19 17:35:41,251 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:35:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:35:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:35:41,252 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:35:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:35:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:35:41,252 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:35:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:35:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:35:41,252 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:35:41,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:35:41,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:35:41,253 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 17:35:41,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 17:35:41,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 17:35:41,253 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:35:41,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:35:41,376 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:35:41,377 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:35:41 BoogieIcfgContainer [2021-02-19 17:35:41,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:35:41,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:35:41,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:35:41,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:35:41,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:35:41" (1/2) ... [2021-02-19 17:35:41,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359a1441 and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:35:41, skipping insertion in model container [2021-02-19 17:35:41,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:35:41" (2/2) ... [2021-02-19 17:35:41,382 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl [2021-02-19 17:35:41,385 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:35:41,385 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:35:41,387 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:35:41,388 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:35:41,414 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 17:35:41,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 17:35:41,436 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:35:41,436 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:35:41,437 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:35:41,437 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:35:41,437 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:35:41,437 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:35:41,437 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:35:41,437 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:35:41,443 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-02-19 17:35:41,509 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) [2021-02-19 17:35:41,514 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) [2021-02-19 17:35:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:35:41,528 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:41,529 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:41,529 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1934394026, now seen corresponding path program 1 times [2021-02-19 17:35:41,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:41,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092086844] [2021-02-19 17:35:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:41,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092086844] [2021-02-19 17:35:41,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:41,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:35:41,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542113040] [2021-02-19 17:35:41,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:35:41,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:35:41,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:35:41,740 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) [2021-02-19 17:35:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:41,819 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-02-19 17:35:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:35:41,820 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 [2021-02-19 17:35:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:41,837 INFO L225 Difference]: With dead ends: 854 [2021-02-19 17:35:41,837 INFO L226 Difference]: Without dead ends: 823 [2021-02-19 17:35:41,838 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:35:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-02-19 17:35:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-02-19 17:35:41,898 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) [2021-02-19 17:35:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-02-19 17:35:41,902 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-02-19 17:35:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:41,903 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-02-19 17:35:41,903 INFO L481 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) [2021-02-19 17:35:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-02-19 17:35:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:41,907 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:41,907 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:41,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:35:41,908 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash -197222890, now seen corresponding path program 1 times [2021-02-19 17:35:41,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:41,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472745486] [2021-02-19 17:35:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:41,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472745486] [2021-02-19 17:35:41,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262994083] [2021-02-19 17:35:41,943 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 [2021-02-19 17:35:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:35:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:42,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:42,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 17:35:42,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333657740] [2021-02-19 17:35:42,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:35:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:35:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:35:42,055 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:42,118 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2021-02-19 17:35:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:35:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:35:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:42,125 INFO L225 Difference]: With dead ends: 1354 [2021-02-19 17:35:42,125 INFO L226 Difference]: Without dead ends: 1354 [2021-02-19 17:35:42,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-02-19 17:35:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2021-02-19 17:35:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2021-02-19 17:35:42,151 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2021-02-19 17:35:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:42,151 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2021-02-19 17:35:42,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2021-02-19 17:35:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:42,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:42,155 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:42,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 17:35:42,370 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:42,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:42,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1859794194, now seen corresponding path program 1 times [2021-02-19 17:35:42,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:42,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638115206] [2021-02-19 17:35:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638115206] [2021-02-19 17:35:42,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:42,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:35:42,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132059558] [2021-02-19 17:35:42,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:42,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:42,428 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:42,492 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2021-02-19 17:35:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:35:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-02-19 17:35:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:42,497 INFO L225 Difference]: With dead ends: 973 [2021-02-19 17:35:42,497 INFO L226 Difference]: Without dead ends: 953 [2021-02-19 17:35:42,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-02-19 17:35:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2021-02-19 17:35:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2021-02-19 17:35:42,520 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2021-02-19 17:35:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:42,520 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2021-02-19 17:35:42,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2021-02-19 17:35:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:42,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:42,522 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:42,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:35:42,523 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:42,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1865797288, now seen corresponding path program 1 times [2021-02-19 17:35:42,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:42,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963161709] [2021-02-19 17:35:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963161709] [2021-02-19 17:35:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665750627] [2021-02-19 17:35:42,559 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) [2021-02-19 17:35:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:35:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:42,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:42,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-02-19 17:35:42,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087322403] [2021-02-19 17:35:42,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:42,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:42,656 INFO L87 Difference]: Start difference. First operand 775 states and 2969 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:42,706 INFO L93 Difference]: Finished difference Result 1748 states and 6634 transitions. [2021-02-19 17:35:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-02-19 17:35:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:42,716 INFO L225 Difference]: With dead ends: 1748 [2021-02-19 17:35:42,716 INFO L226 Difference]: Without dead ends: 1748 [2021-02-19 17:35:42,716 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-02-19 17:35:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 931. [2021-02-19 17:35:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.968817204301075) internal successors, (3691), 930 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3691 transitions. [2021-02-19 17:35:42,757 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3691 transitions. Word has length 21 [2021-02-19 17:35:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:42,758 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3691 transitions. [2021-02-19 17:35:42,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3691 transitions. [2021-02-19 17:35:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:42,760 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:42,761 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:42,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:42,966 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash 371319000, now seen corresponding path program 1 times [2021-02-19 17:35:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:42,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053630976] [2021-02-19 17:35:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:42,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053630976] [2021-02-19 17:35:42,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:42,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:35:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291319509] [2021-02-19 17:35:42,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:42,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:42,986 INFO L87 Difference]: Start difference. First operand 931 states and 3691 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:43,031 INFO L93 Difference]: Finished difference Result 1477 states and 5627 transitions. [2021-02-19 17:35:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-02-19 17:35:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:43,039 INFO L225 Difference]: With dead ends: 1477 [2021-02-19 17:35:43,039 INFO L226 Difference]: Without dead ends: 1453 [2021-02-19 17:35:43,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-02-19 17:35:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 985. [2021-02-19 17:35:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.9227642276422765) internal successors, (3860), 984 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3860 transitions. [2021-02-19 17:35:43,064 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3860 transitions. Word has length 21 [2021-02-19 17:35:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:43,064 INFO L480 AbstractCegarLoop]: Abstraction has 985 states and 3860 transitions. [2021-02-19 17:35:43,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3860 transitions. [2021-02-19 17:35:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:43,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,067 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:43,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:35:43,067 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash 329500888, now seen corresponding path program 2 times [2021-02-19 17:35:43,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760175969] [2021-02-19 17:35:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:43,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760175969] [2021-02-19 17:35:43,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:43,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:35:43,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251653441] [2021-02-19 17:35:43,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:43,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:43,084 INFO L87 Difference]: Start difference. First operand 985 states and 3860 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:43,123 INFO L93 Difference]: Finished difference Result 1520 states and 5831 transitions. [2021-02-19 17:35:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-02-19 17:35:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:43,131 INFO L225 Difference]: With dead ends: 1520 [2021-02-19 17:35:43,131 INFO L226 Difference]: Without dead ends: 1520 [2021-02-19 17:35:43,131 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-02-19 17:35:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1119. [2021-02-19 17:35:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.952593917710197) internal successors, (4419), 1118 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4419 transitions. [2021-02-19 17:35:43,160 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4419 transitions. Word has length 21 [2021-02-19 17:35:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:43,160 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 4419 transitions. [2021-02-19 17:35:43,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4419 transitions. [2021-02-19 17:35:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:43,162 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,163 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:43,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:35:43,163 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1318967568, now seen corresponding path program 2 times [2021-02-19 17:35:43,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791600348] [2021-02-19 17:35:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:43,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791600348] [2021-02-19 17:35:43,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:43,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:35:43,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171837897] [2021-02-19 17:35:43,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:43,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:43,180 INFO L87 Difference]: Start difference. First operand 1119 states and 4419 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:43,221 INFO L93 Difference]: Finished difference Result 1519 states and 5747 transitions. [2021-02-19 17:35:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2021-02-19 17:35:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:43,228 INFO L225 Difference]: With dead ends: 1519 [2021-02-19 17:35:43,228 INFO L226 Difference]: Without dead ends: 1478 [2021-02-19 17:35:43,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-02-19 17:35:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1174. [2021-02-19 17:35:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2021-02-19 17:35:43,256 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2021-02-19 17:35:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:43,257 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2021-02-19 17:35:43,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2021-02-19 17:35:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2021-02-19 17:35:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:35:43,259 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,259 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:43,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:35:43,260 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1863097230, now seen corresponding path program 2 times [2021-02-19 17:35:43,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911463541] [2021-02-19 17:35:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:43,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911463541] [2021-02-19 17:35:43,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:43,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:35:43,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155385830] [2021-02-19 17:35:43,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:35:43,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:35:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,281 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 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) [2021-02-19 17:35:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:43,316 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2021-02-19 17:35:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:43,317 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 [2021-02-19 17:35:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:43,324 INFO L225 Difference]: With dead ends: 1589 [2021-02-19 17:35:43,324 INFO L226 Difference]: Without dead ends: 1589 [2021-02-19 17:35:43,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-02-19 17:35:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2021-02-19 17:35:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2021-02-19 17:35:43,352 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2021-02-19 17:35:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:43,352 INFO L480 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2021-02-19 17:35:43,352 INFO L481 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) [2021-02-19 17:35:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2021-02-19 17:35:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:35:43,355 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,355 INFO L506 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] [2021-02-19 17:35:43,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:35:43,355 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash 538977746, now seen corresponding path program 1 times [2021-02-19 17:35:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205400887] [2021-02-19 17:35:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205400887] [2021-02-19 17:35:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033418667] [2021-02-19 17:35:43,388 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) [2021-02-19 17:35:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:35:43,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:43,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:43,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-02-19 17:35:43,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775464540] [2021-02-19 17:35:43,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:35:43,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:35:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,500 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 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) [2021-02-19 17:35:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:43,570 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2021-02-19 17:35:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:43,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 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 [2021-02-19 17:35:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:43,592 INFO L225 Difference]: With dead ends: 2143 [2021-02-19 17:35:43,592 INFO L226 Difference]: Without dead ends: 2075 [2021-02-19 17:35:43,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-02-19 17:35:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2021-02-19 17:35:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2021-02-19 17:35:43,638 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2021-02-19 17:35:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:43,638 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2021-02-19 17:35:43,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 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) [2021-02-19 17:35:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2021-02-19 17:35:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:35:43,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,643 INFO L506 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] [2021-02-19 17:35:43,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:43,857 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1114307022, now seen corresponding path program 2 times [2021-02-19 17:35:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110323445] [2021-02-19 17:35:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110323445] [2021-02-19 17:35:43,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:43,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:35:43,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322220738] [2021-02-19 17:35:43,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:43,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:43,902 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 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) [2021-02-19 17:35:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:43,946 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2021-02-19 17:35:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:35:43,947 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 [2021-02-19 17:35:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:43,953 INFO L225 Difference]: With dead ends: 2365 [2021-02-19 17:35:43,953 INFO L226 Difference]: Without dead ends: 2297 [2021-02-19 17:35:43,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-02-19 17:35:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2021-02-19 17:35:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2021-02-19 17:35:43,991 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2021-02-19 17:35:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:43,991 INFO L480 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2021-02-19 17:35:43,992 INFO L481 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) [2021-02-19 17:35:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2021-02-19 17:35:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:35:43,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,995 INFO L506 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] [2021-02-19 17:35:43,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:35:43,996 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1868274778, now seen corresponding path program 1 times [2021-02-19 17:35:43,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964431711] [2021-02-19 17:35:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:44,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964431711] [2021-02-19 17:35:44,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97085335] [2021-02-19 17:35:44,028 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) [2021-02-19 17:35:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:35:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:44,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:44,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-02-19 17:35:44,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535426614] [2021-02-19 17:35:44,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:35:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:35:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:44,137 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:44,248 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2021-02-19 17:35:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:44,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:35:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:44,255 INFO L225 Difference]: With dead ends: 2448 [2021-02-19 17:35:44,255 INFO L226 Difference]: Without dead ends: 2397 [2021-02-19 17:35:44,255 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-02-19 17:35:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2021-02-19 17:35:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2021-02-19 17:35:44,295 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2021-02-19 17:35:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:44,295 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2021-02-19 17:35:44,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2021-02-19 17:35:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:35:44,299 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:44,299 INFO L506 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] [2021-02-19 17:35:44,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:44,516 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:44,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1499166610, now seen corresponding path program 2 times [2021-02-19 17:35:44,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:44,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685061689] [2021-02-19 17:35:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:44,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685061689] [2021-02-19 17:35:44,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:44,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:35:44,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109057323] [2021-02-19 17:35:44,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:35:44,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:44,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:35:44,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:44,549 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 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) [2021-02-19 17:35:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:44,601 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2021-02-19 17:35:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:35:44,601 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 [2021-02-19 17:35:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:44,609 INFO L225 Difference]: With dead ends: 2710 [2021-02-19 17:35:44,609 INFO L226 Difference]: Without dead ends: 2659 [2021-02-19 17:35:44,609 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:35:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-02-19 17:35:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2021-02-19 17:35:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2021-02-19 17:35:44,682 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2021-02-19 17:35:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:44,682 INFO L480 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2021-02-19 17:35:44,683 INFO L481 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) [2021-02-19 17:35:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2021-02-19 17:35:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:44,687 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:44,688 INFO L506 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] [2021-02-19 17:35:44,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:35:44,688 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:44,688 INFO L82 PathProgramCache]: Analyzing trace with hash 202766292, now seen corresponding path program 3 times [2021-02-19 17:35:44,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:44,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879423388] [2021-02-19 17:35:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879423388] [2021-02-19 17:35:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632362614] [2021-02-19 17:35:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:35:44,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:44,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:44,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:44,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505472912] [2021-02-19 17:35:44,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:44,811 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-02-19 17:35:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:45,124 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2021-02-19 17:35:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:35:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 [2021-02-19 17:35:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:45,141 INFO L225 Difference]: With dead ends: 6038 [2021-02-19 17:35:45,141 INFO L226 Difference]: Without dead ends: 6038 [2021-02-19 17:35:45,141 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:35:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-02-19 17:35:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2021-02-19 17:35:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2021-02-19 17:35:45,217 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2021-02-19 17:35:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:45,217 INFO L480 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2021-02-19 17:35:45,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-02-19 17:35:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2021-02-19 17:35:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:45,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:45,223 INFO L506 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] [2021-02-19 17:35:45,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 17:35:45,442 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1254515156, now seen corresponding path program 4 times [2021-02-19 17:35:45,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:45,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652387568] [2021-02-19 17:35:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:45,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652387568] [2021-02-19 17:35:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515435085] [2021-02-19 17:35:45,472 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:45,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:45,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:45,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:45,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:45,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361729001] [2021-02-19 17:35:45,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:45,562 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-02-19 17:35:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:45,741 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2021-02-19 17:35:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:45,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 [2021-02-19 17:35:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:45,755 INFO L225 Difference]: With dead ends: 5607 [2021-02-19 17:35:45,755 INFO L226 Difference]: Without dead ends: 5495 [2021-02-19 17:35:45,756 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:35:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-02-19 17:35:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2021-02-19 17:35:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2021-02-19 17:35:45,840 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2021-02-19 17:35:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:45,840 INFO L480 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2021-02-19 17:35:45,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-02-19 17:35:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2021-02-19 17:35:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:45,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:45,847 INFO L506 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] [2021-02-19 17:35:46,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:46,063 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:46,064 INFO L82 PathProgramCache]: Analyzing trace with hash 204661680, now seen corresponding path program 5 times [2021-02-19 17:35:46,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:46,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321037185] [2021-02-19 17:35:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:46,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321037185] [2021-02-19 17:35:46,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016571186] [2021-02-19 17:35:46,095 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 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 [2021-02-19 17:35:46,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:46,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:46,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053045542] [2021-02-19 17:35:46,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:46,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:46,184 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 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) [2021-02-19 17:35:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:46,333 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2021-02-19 17:35:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:46,333 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 25 [2021-02-19 17:35:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:46,352 INFO L225 Difference]: With dead ends: 5302 [2021-02-19 17:35:46,352 INFO L226 Difference]: Without dead ends: 5302 [2021-02-19 17:35:46,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-02-19 17:35:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2021-02-19 17:35:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2021-02-19 17:35:46,444 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2021-02-19 17:35:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:46,445 INFO L480 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2021-02-19 17:35:46,445 INFO L481 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) [2021-02-19 17:35:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2021-02-19 17:35:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:46,452 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:46,452 INFO L506 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] [2021-02-19 17:35:46,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 17:35:46,668 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 651272556, now seen corresponding path program 6 times [2021-02-19 17:35:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:46,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479339691] [2021-02-19 17:35:46,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479339691] [2021-02-19 17:35:46,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63428983] [2021-02-19 17:35:46,700 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 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 [2021-02-19 17:35:46,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:35:46,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:46,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:46,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:46,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:46,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748025326] [2021-02-19 17:35:46,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:46,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:46,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:46,797 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 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) [2021-02-19 17:35:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:46,933 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2021-02-19 17:35:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:46,933 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 25 [2021-02-19 17:35:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:46,944 INFO L225 Difference]: With dead ends: 4788 [2021-02-19 17:35:46,944 INFO L226 Difference]: Without dead ends: 4768 [2021-02-19 17:35:46,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-02-19 17:35:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2021-02-19 17:35:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2021-02-19 17:35:47,020 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2021-02-19 17:35:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:47,020 INFO L480 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2021-02-19 17:35:47,020 INFO L481 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) [2021-02-19 17:35:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2021-02-19 17:35:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:47,027 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:47,027 INFO L506 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] [2021-02-19 17:35:47,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 17:35:47,247 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1201614412, now seen corresponding path program 7 times [2021-02-19 17:35:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:47,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541528388] [2021-02-19 17:35:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541528388] [2021-02-19 17:35:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238827632] [2021-02-19 17:35:47,278 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:47,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:47,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862532281] [2021-02-19 17:35:47,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:47,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:47,374 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-02-19 17:35:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:47,534 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2021-02-19 17:35:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 [2021-02-19 17:35:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:47,553 INFO L225 Difference]: With dead ends: 7954 [2021-02-19 17:35:47,553 INFO L226 Difference]: Without dead ends: 7954 [2021-02-19 17:35:47,553 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-02-19 17:35:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2021-02-19 17:35:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2021-02-19 17:35:47,685 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2021-02-19 17:35:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:47,685 INFO L480 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2021-02-19 17:35:47,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2021-02-19 17:35:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2021-02-19 17:35:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:47,694 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:47,694 INFO L506 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] [2021-02-19 17:35:47,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 17:35:47,911 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1585752628, now seen corresponding path program 8 times [2021-02-19 17:35:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:47,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221157947] [2021-02-19 17:35:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:47,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221157947] [2021-02-19 17:35:47,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423732676] [2021-02-19 17:35:47,931 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:47,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:47,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:48,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:48,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:48,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103764608] [2021-02-19 17:35:48,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:48,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:48,020 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:35:48,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:48,167 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2021-02-19 17:35:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:48,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 [2021-02-19 17:35:48,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:48,179 INFO L225 Difference]: With dead ends: 6087 [2021-02-19 17:35:48,179 INFO L226 Difference]: Without dead ends: 6059 [2021-02-19 17:35:48,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-02-19 17:35:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2021-02-19 17:35:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2021-02-19 17:35:48,265 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2021-02-19 17:35:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:48,265 INFO L480 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2021-02-19 17:35:48,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:35:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2021-02-19 17:35:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:48,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:48,273 INFO L506 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] [2021-02-19 17:35:48,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 17:35:48,486 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:48,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash 526800048, now seen corresponding path program 9 times [2021-02-19 17:35:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:48,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546724586] [2021-02-19 17:35:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:48,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546724586] [2021-02-19 17:35:48,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619991660] [2021-02-19 17:35:48,523 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 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 [2021-02-19 17:35:48,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:48,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:48,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51105851] [2021-02-19 17:35:48,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:48,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:48,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:48,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:48,658 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 17:35:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:48,863 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2021-02-19 17:35:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 [2021-02-19 17:35:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:48,878 INFO L225 Difference]: With dead ends: 6950 [2021-02-19 17:35:48,879 INFO L226 Difference]: Without dead ends: 6950 [2021-02-19 17:35:48,879 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-02-19 17:35:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2021-02-19 17:35:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2021-02-19 17:35:48,992 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2021-02-19 17:35:48,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:48,992 INFO L480 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2021-02-19 17:35:48,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 17:35:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2021-02-19 17:35:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:49,001 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:49,001 INFO L506 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] [2021-02-19 17:35:49,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:49,218 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:49,218 INFO L82 PathProgramCache]: Analyzing trace with hash 973410924, now seen corresponding path program 10 times [2021-02-19 17:35:49,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:49,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083276716] [2021-02-19 17:35:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083276716] [2021-02-19 17:35:49,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963967103] [2021-02-19 17:35:49,245 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 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 [2021-02-19 17:35:49,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:49,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:49,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:49,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:49,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603919851] [2021-02-19 17:35:49,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:49,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:49,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:49,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:49,310 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 17:35:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:49,462 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2021-02-19 17:35:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:35:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 [2021-02-19 17:35:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:49,478 INFO L225 Difference]: With dead ends: 7627 [2021-02-19 17:35:49,478 INFO L226 Difference]: Without dead ends: 7607 [2021-02-19 17:35:49,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-02-19 17:35:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2021-02-19 17:35:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2021-02-19 17:35:49,640 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2021-02-19 17:35:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:49,641 INFO L480 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2021-02-19 17:35:49,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 17:35:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2021-02-19 17:35:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:49,650 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:49,650 INFO L506 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] [2021-02-19 17:35:49,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:49,858 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash 258053620, now seen corresponding path program 11 times [2021-02-19 17:35:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:49,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710865977] [2021-02-19 17:35:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710865977] [2021-02-19 17:35:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835859261] [2021-02-19 17:35:49,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:35:49,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:49,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:49,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:49,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473268880] [2021-02-19 17:35:49,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:49,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:49,943 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 17:35:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:50,230 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2021-02-19 17:35:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:35:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 [2021-02-19 17:35:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:50,247 INFO L225 Difference]: With dead ends: 7378 [2021-02-19 17:35:50,247 INFO L226 Difference]: Without dead ends: 7378 [2021-02-19 17:35:50,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:35:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-02-19 17:35:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2021-02-19 17:35:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2021-02-19 17:35:50,340 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2021-02-19 17:35:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:50,340 INFO L480 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2021-02-19 17:35:50,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 17:35:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2021-02-19 17:35:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:50,349 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:50,349 INFO L506 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] [2021-02-19 17:35:50,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 17:35:50,558 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:50,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1577192366, now seen corresponding path program 12 times [2021-02-19 17:35:50,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:50,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97159229] [2021-02-19 17:35:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97159229] [2021-02-19 17:35:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052092136] [2021-02-19 17:35:50,584 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 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 [2021-02-19 17:35:50,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:35:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:50,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:50,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:50,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436233081] [2021-02-19 17:35:50,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:50,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:50,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:50,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:50,664 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 17:35:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:50,829 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2021-02-19 17:35:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 [2021-02-19 17:35:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:50,874 INFO L225 Difference]: With dead ends: 7943 [2021-02-19 17:35:50,874 INFO L226 Difference]: Without dead ends: 7883 [2021-02-19 17:35:50,875 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:35:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-02-19 17:35:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2021-02-19 17:35:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2021-02-19 17:35:50,967 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2021-02-19 17:35:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:50,967 INFO L480 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2021-02-19 17:35:50,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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) [2021-02-19 17:35:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2021-02-19 17:35:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:50,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:50,977 INFO L506 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] [2021-02-19 17:35:51,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:51,193 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1628733276, now seen corresponding path program 3 times [2021-02-19 17:35:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:51,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418097465] [2021-02-19 17:35:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:51,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418097465] [2021-02-19 17:35:51,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721473406] [2021-02-19 17:35:51,217 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 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 [2021-02-19 17:35:51,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:51,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:51,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:51,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:51,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:51,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720709477] [2021-02-19 17:35:51,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:51,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:51,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:51,281 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 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) [2021-02-19 17:35:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:51,550 INFO L93 Difference]: Finished difference Result 15644 states and 64448 transitions. [2021-02-19 17:35:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:35:51,550 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 25 [2021-02-19 17:35:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:51,586 INFO L225 Difference]: With dead ends: 15644 [2021-02-19 17:35:51,586 INFO L226 Difference]: Without dead ends: 15644 [2021-02-19 17:35:51,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:35:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-02-19 17:35:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 7401. [2021-02-19 17:35:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2021-02-19 17:35:51,792 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2021-02-19 17:35:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:51,792 INFO L480 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2021-02-19 17:35:51,792 INFO L481 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) [2021-02-19 17:35:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2021-02-19 17:35:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:51,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:51,806 INFO L506 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] [2021-02-19 17:35:52,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 17:35:52,020 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:52,020 INFO L82 PathProgramCache]: Analyzing trace with hash -281129252, now seen corresponding path program 4 times [2021-02-19 17:35:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:52,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389793054] [2021-02-19 17:35:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:52,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389793054] [2021-02-19 17:35:52,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517733966] [2021-02-19 17:35:52,042 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 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 [2021-02-19 17:35:52,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:52,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:52,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:52,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:52,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162306268] [2021-02-19 17:35:52,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:52,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:52,109 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:52,341 INFO L93 Difference]: Finished difference Result 14414 states and 59525 transitions. [2021-02-19 17:35:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:52,375 INFO L225 Difference]: With dead ends: 14414 [2021-02-19 17:35:52,376 INFO L226 Difference]: Without dead ends: 14318 [2021-02-19 17:35:52,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2021-02-19 17:35:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 9947. [2021-02-19 17:35:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.3626583551176354) internal successors, (43391), 9946 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 43391 transitions. [2021-02-19 17:35:52,637 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 43391 transitions. Word has length 25 [2021-02-19 17:35:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:52,637 INFO L480 AbstractCegarLoop]: Abstraction has 9947 states and 43391 transitions. [2021-02-19 17:35:52,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 43391 transitions. [2021-02-19 17:35:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:52,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:52,653 INFO L506 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] [2021-02-19 17:35:52,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:52,854 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 800841436, now seen corresponding path program 5 times [2021-02-19 17:35:52,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:52,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037353648] [2021-02-19 17:35:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037353648] [2021-02-19 17:35:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681950008] [2021-02-19 17:35:52,870 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 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 [2021-02-19 17:35:52,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:52,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:52,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:52,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:52,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53476038] [2021-02-19 17:35:52,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:52,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:52,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:52,947 INFO L87 Difference]: Start difference. First operand 9947 states and 43391 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) [2021-02-19 17:35:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:53,133 INFO L93 Difference]: Finished difference Result 14334 states and 59778 transitions. [2021-02-19 17:35:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:35:53,133 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 25 [2021-02-19 17:35:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:53,167 INFO L225 Difference]: With dead ends: 14334 [2021-02-19 17:35:53,167 INFO L226 Difference]: Without dead ends: 14334 [2021-02-19 17:35:53,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-02-19 17:35:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9809. [2021-02-19 17:35:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9809 states, 9808 states have (on average 4.337173735725938) internal successors, (42539), 9808 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9809 states to 9809 states and 42539 transitions. [2021-02-19 17:35:53,479 INFO L78 Accepts]: Start accepts. Automaton has 9809 states and 42539 transitions. Word has length 25 [2021-02-19 17:35:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:53,480 INFO L480 AbstractCegarLoop]: Abstraction has 9809 states and 42539 transitions. [2021-02-19 17:35:53,480 INFO L481 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) [2021-02-19 17:35:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9809 states and 42539 transitions. [2021-02-19 17:35:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:53,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:53,496 INFO L506 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] [2021-02-19 17:35:53,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 17:35:53,696 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:53,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1790308116, now seen corresponding path program 6 times [2021-02-19 17:35:53,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:53,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593281489] [2021-02-19 17:35:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:53,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593281489] [2021-02-19 17:35:53,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668974749] [2021-02-19 17:35:53,778 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 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 [2021-02-19 17:35:53,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:35:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:53,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:53,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661004227] [2021-02-19 17:35:53,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:53,854 INFO L87 Difference]: Start difference. First operand 9809 states and 42539 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 17:35:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:54,005 INFO L93 Difference]: Finished difference Result 12691 states and 52781 transitions. [2021-02-19 17:35:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 [2021-02-19 17:35:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:54,032 INFO L225 Difference]: With dead ends: 12691 [2021-02-19 17:35:54,032 INFO L226 Difference]: Without dead ends: 12666 [2021-02-19 17:35:54,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2021-02-19 17:35:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 9875. [2021-02-19 17:35:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.332388089933158) internal successors, (42778), 9874 states have internal predecessors, (42778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42778 transitions. [2021-02-19 17:35:54,257 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42778 transitions. Word has length 25 [2021-02-19 17:35:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:54,257 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42778 transitions. [2021-02-19 17:35:54,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 17:35:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42778 transitions. [2021-02-19 17:35:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:54,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:54,274 INFO L506 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] [2021-02-19 17:35:54,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 17:35:54,474 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1726170260, now seen corresponding path program 7 times [2021-02-19 17:35:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:54,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944507643] [2021-02-19 17:35:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944507643] [2021-02-19 17:35:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693842498] [2021-02-19 17:35:54,490 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 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 [2021-02-19 17:35:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:54,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:54,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:54,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:54,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137510870] [2021-02-19 17:35:54,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:54,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:54,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:54,575 INFO L87 Difference]: Start difference. First operand 9875 states and 42778 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-02-19 17:35:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:54,737 INFO L93 Difference]: Finished difference Result 16572 states and 68392 transitions. [2021-02-19 17:35:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 [2021-02-19 17:35:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:54,850 INFO L225 Difference]: With dead ends: 16572 [2021-02-19 17:35:54,851 INFO L226 Difference]: Without dead ends: 16572 [2021-02-19 17:35:54,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16572 states. [2021-02-19 17:35:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16572 to 9875. [2021-02-19 17:35:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.3184119910877055) internal successors, (42640), 9874 states have internal predecessors, (42640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42640 transitions. [2021-02-19 17:35:55,138 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42640 transitions. Word has length 25 [2021-02-19 17:35:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:55,138 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42640 transitions. [2021-02-19 17:35:55,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-02-19 17:35:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42640 transitions. [2021-02-19 17:35:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:55,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:55,157 INFO L506 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] [2021-02-19 17:35:55,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 17:35:55,366 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1488206868, now seen corresponding path program 8 times [2021-02-19 17:35:55,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:55,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066992248] [2021-02-19 17:35:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:55,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066992248] [2021-02-19 17:35:55,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797110746] [2021-02-19 17:35:55,380 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 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 [2021-02-19 17:35:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:55,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:55,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755437420] [2021-02-19 17:35:55,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:55,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:55,447 INFO L87 Difference]: Start difference. First operand 9875 states and 42640 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) [2021-02-19 17:35:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:55,625 INFO L93 Difference]: Finished difference Result 13953 states and 57309 transitions. [2021-02-19 17:35:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:55,625 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 25 [2021-02-19 17:35:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:55,656 INFO L225 Difference]: With dead ends: 13953 [2021-02-19 17:35:55,656 INFO L226 Difference]: Without dead ends: 13929 [2021-02-19 17:35:55,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-02-19 17:35:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 9623. [2021-02-19 17:35:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.305757638744543) internal successors, (41430), 9622 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 41430 transitions. [2021-02-19 17:35:55,883 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 41430 transitions. Word has length 25 [2021-02-19 17:35:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:55,883 INFO L480 AbstractCegarLoop]: Abstraction has 9623 states and 41430 transitions. [2021-02-19 17:35:55,883 INFO L481 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) [2021-02-19 17:35:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 41430 transitions. [2021-02-19 17:35:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:55,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:55,899 INFO L506 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] [2021-02-19 17:35:56,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 17:35:56,112 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:56,113 INFO L82 PathProgramCache]: Analyzing trace with hash -192289772, now seen corresponding path program 9 times [2021-02-19 17:35:56,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:56,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942338037] [2021-02-19 17:35:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942338037] [2021-02-19 17:35:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588969500] [2021-02-19 17:35:56,126 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 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 [2021-02-19 17:35:56,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:56,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:56,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:56,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:56,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363554072] [2021-02-19 17:35:56,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:56,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:56,200 INFO L87 Difference]: Start difference. First operand 9623 states and 41430 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) [2021-02-19 17:35:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:56,413 INFO L93 Difference]: Finished difference Result 16966 states and 70031 transitions. [2021-02-19 17:35:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:56,413 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 25 [2021-02-19 17:35:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:56,454 INFO L225 Difference]: With dead ends: 16966 [2021-02-19 17:35:56,454 INFO L226 Difference]: Without dead ends: 16966 [2021-02-19 17:35:56,454 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:35:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-02-19 17:35:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 9761. [2021-02-19 17:35:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.303893442622951) internal successors, (42006), 9760 states have internal predecessors, (42006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 42006 transitions. [2021-02-19 17:35:56,755 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 42006 transitions. Word has length 25 [2021-02-19 17:35:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:56,755 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 42006 transitions. [2021-02-19 17:35:56,755 INFO L481 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) [2021-02-19 17:35:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 42006 transitions. [2021-02-19 17:35:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:56,772 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:56,772 INFO L506 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] [2021-02-19 17:35:56,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:35:56,972 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash 797176908, now seen corresponding path program 10 times [2021-02-19 17:35:56,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:56,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477975415] [2021-02-19 17:35:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477975415] [2021-02-19 17:35:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076702472] [2021-02-19 17:35:57,073 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 [2021-02-19 17:35:57,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:57,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:57,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:57,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526247729] [2021-02-19 17:35:57,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:57,156 INFO L87 Difference]: Start difference. First operand 9761 states and 42006 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 17:35:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:57,329 INFO L93 Difference]: Finished difference Result 15336 states and 62550 transitions. [2021-02-19 17:35:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 [2021-02-19 17:35:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:57,363 INFO L225 Difference]: With dead ends: 15336 [2021-02-19 17:35:57,363 INFO L226 Difference]: Without dead ends: 15311 [2021-02-19 17:35:57,363 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2021-02-19 17:35:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 9761. [2021-02-19 17:35:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.30266393442623) internal successors, (41994), 9760 states have internal predecessors, (41994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 41994 transitions. [2021-02-19 17:35:57,574 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 41994 transitions. Word has length 25 [2021-02-19 17:35:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:57,574 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 41994 transitions. [2021-02-19 17:35:57,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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) [2021-02-19 17:35:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 41994 transitions. [2021-02-19 17:35:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:57,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:57,590 INFO L506 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] [2021-02-19 17:35:57,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:57,791 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:57,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1066544432, now seen corresponding path program 11 times [2021-02-19 17:35:57,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:57,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442609454] [2021-02-19 17:35:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:57,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442609454] [2021-02-19 17:35:57,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890015513] [2021-02-19 17:35:57,820 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 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 [2021-02-19 17:35:57,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:57,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:57,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90721572] [2021-02-19 17:35:57,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:57,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:57,934 INFO L87 Difference]: Start difference. First operand 9761 states and 41994 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:58,221 INFO L93 Difference]: Finished difference Result 16139 states and 67397 transitions. [2021-02-19 17:35:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:35:58,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:58,258 INFO L225 Difference]: With dead ends: 16139 [2021-02-19 17:35:58,259 INFO L226 Difference]: Without dead ends: 16139 [2021-02-19 17:35:58,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:35:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-02-19 17:35:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 10624. [2021-02-19 17:35:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 4.260284288807305) internal successors, (45257), 10623 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 45257 transitions. [2021-02-19 17:35:58,458 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 45257 transitions. Word has length 25 [2021-02-19 17:35:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:58,458 INFO L480 AbstractCegarLoop]: Abstraction has 10624 states and 45257 transitions. [2021-02-19 17:35:58,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 45257 transitions. [2021-02-19 17:35:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:58,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:58,476 INFO L506 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] [2021-02-19 17:35:58,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 17:35:58,678 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:58,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:58,678 INFO L82 PathProgramCache]: Analyzing trace with hash -200280194, now seen corresponding path program 12 times [2021-02-19 17:35:58,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:58,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242211924] [2021-02-19 17:35:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242211924] [2021-02-19 17:35:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926953152] [2021-02-19 17:35:58,694 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 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 [2021-02-19 17:35:58,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:35:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:58,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:58,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:58,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:58,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449754354] [2021-02-19 17:35:58,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:58,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:58,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:58,758 INFO L87 Difference]: Start difference. First operand 10624 states and 45257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:59,013 INFO L93 Difference]: Finished difference Result 15510 states and 62671 transitions. [2021-02-19 17:35:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:59,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:59,046 INFO L225 Difference]: With dead ends: 15510 [2021-02-19 17:35:59,046 INFO L226 Difference]: Without dead ends: 15419 [2021-02-19 17:35:59,047 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15419 states. [2021-02-19 17:35:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15419 to 11124. [2021-02-19 17:35:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 4.2321316191674905) internal successors, (47074), 11123 states have internal predecessors, (47074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 47074 transitions. [2021-02-19 17:35:59,250 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 47074 transitions. Word has length 25 [2021-02-19 17:35:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:59,250 INFO L480 AbstractCegarLoop]: Abstraction has 11124 states and 47074 transitions. [2021-02-19 17:35:59,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 47074 transitions. [2021-02-19 17:35:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:59,268 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:59,268 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:59,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:59,475 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:59,475 INFO L82 PathProgramCache]: Analyzing trace with hash 277855062, now seen corresponding path program 13 times [2021-02-19 17:35:59,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:59,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787973471] [2021-02-19 17:35:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:59,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787973471] [2021-02-19 17:35:59,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165187704] [2021-02-19 17:35:59,506 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 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 [2021-02-19 17:35:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:59,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:59,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399214470] [2021-02-19 17:35:59,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:59,647 INFO L87 Difference]: Start difference. First operand 11124 states and 47074 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-02-19 17:35:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:59,832 INFO L93 Difference]: Finished difference Result 12725 states and 52883 transitions. [2021-02-19 17:35:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 27 [2021-02-19 17:35:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:59,863 INFO L225 Difference]: With dead ends: 12725 [2021-02-19 17:35:59,863 INFO L226 Difference]: Without dead ends: 12657 [2021-02-19 17:35:59,863 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-02-19 17:36:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 11743. [2021-02-19 17:36:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 4.222619655935956) internal successors, (49582), 11742 states have internal predecessors, (49582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 49582 transitions. [2021-02-19 17:36:00,092 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 49582 transitions. Word has length 27 [2021-02-19 17:36:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:00,092 INFO L480 AbstractCegarLoop]: Abstraction has 11743 states and 49582 transitions. [2021-02-19 17:36:00,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-02-19 17:36:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 49582 transitions. [2021-02-19 17:36:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:00,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:00,113 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:00,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 17:36:00,314 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:00,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2098444658, now seen corresponding path program 14 times [2021-02-19 17:36:00,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:00,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638450750] [2021-02-19 17:36:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:36:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638450750] [2021-02-19 17:36:00,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189811224] [2021-02-19 17:36:00,353 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:00,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:00,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:00,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:00,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-02-19 17:36:00,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731075797] [2021-02-19 17:36:00,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:00,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:00,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:00,500 INFO L87 Difference]: Start difference. First operand 11743 states and 49582 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:00,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:00,774 INFO L93 Difference]: Finished difference Result 13435 states and 55712 transitions. [2021-02-19 17:36:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:36:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:00,809 INFO L225 Difference]: With dead ends: 13435 [2021-02-19 17:36:00,809 INFO L226 Difference]: Without dead ends: 13299 [2021-02-19 17:36:00,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-02-19 17:36:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 11989. [2021-02-19 17:36:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 11988 states have (on average 4.226976976976977) internal successors, (50673), 11988 states have internal predecessors, (50673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 50673 transitions. [2021-02-19 17:36:01,062 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 50673 transitions. Word has length 27 [2021-02-19 17:36:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:01,063 INFO L480 AbstractCegarLoop]: Abstraction has 11989 states and 50673 transitions. [2021-02-19 17:36:01,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 50673 transitions. [2021-02-19 17:36:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:01,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:01,084 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:01,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 17:36:01,285 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1839631470, now seen corresponding path program 1 times [2021-02-19 17:36:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:01,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107335378] [2021-02-19 17:36:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:01,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107335378] [2021-02-19 17:36:01,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98339394] [2021-02-19 17:36:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:01,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:01,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:36:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823941568] [2021-02-19 17:36:01,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:01,450 INFO L87 Difference]: Start difference. First operand 11989 states and 50673 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:36:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:01,709 INFO L93 Difference]: Finished difference Result 12852 states and 53545 transitions. [2021-02-19 17:36:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 27 [2021-02-19 17:36:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:01,740 INFO L225 Difference]: With dead ends: 12852 [2021-02-19 17:36:01,740 INFO L226 Difference]: Without dead ends: 12484 [2021-02-19 17:36:01,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-02-19 17:36:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12212. [2021-02-19 17:36:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12211 states have (on average 4.207108344934895) internal successors, (51373), 12211 states have internal predecessors, (51373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 51373 transitions. [2021-02-19 17:36:01,968 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 51373 transitions. Word has length 27 [2021-02-19 17:36:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:01,968 INFO L480 AbstractCegarLoop]: Abstraction has 12212 states and 51373 transitions. [2021-02-19 17:36:01,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:36:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 51373 transitions. [2021-02-19 17:36:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:01,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:01,987 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:02,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 17:36:02,190 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1753575774, now seen corresponding path program 2 times [2021-02-19 17:36:02,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:02,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923534568] [2021-02-19 17:36:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:02,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923534568] [2021-02-19 17:36:02,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919003851] [2021-02-19 17:36:02,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:36:02,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:02,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:02,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-02-19 17:36:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496031820] [2021-02-19 17:36:02,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:02,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:02,399 INFO L87 Difference]: Start difference. First operand 12212 states and 51373 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:02,639 INFO L93 Difference]: Finished difference Result 12962 states and 53969 transitions. [2021-02-19 17:36:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:36:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:02,670 INFO L225 Difference]: With dead ends: 12962 [2021-02-19 17:36:02,671 INFO L226 Difference]: Without dead ends: 12648 [2021-02-19 17:36:02,671 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2021-02-19 17:36:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12240. [2021-02-19 17:36:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12240 states, 12239 states have (on average 4.2166026636163085) internal successors, (51607), 12239 states have internal predecessors, (51607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12240 states to 12240 states and 51607 transitions. [2021-02-19 17:36:02,889 INFO L78 Accepts]: Start accepts. Automaton has 12240 states and 51607 transitions. Word has length 27 [2021-02-19 17:36:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:02,889 INFO L480 AbstractCegarLoop]: Abstraction has 12240 states and 51607 transitions. [2021-02-19 17:36:02,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 12240 states and 51607 transitions. [2021-02-19 17:36:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:02,908 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:02,908 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:03,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 17:36:03,109 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash -42629102, now seen corresponding path program 3 times [2021-02-19 17:36:03,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:03,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769814199] [2021-02-19 17:36:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:03,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769814199] [2021-02-19 17:36:03,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71691371] [2021-02-19 17:36:03,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:03,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:36:03,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:03,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:03,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:36:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665176973] [2021-02-19 17:36:03,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:36:03,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:36:03,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:03,242 INFO L87 Difference]: Start difference. First operand 12240 states and 51607 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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) [2021-02-19 17:36:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:03,420 INFO L93 Difference]: Finished difference Result 12764 states and 53549 transitions. [2021-02-19 17:36:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:36:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27 [2021-02-19 17:36:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:03,451 INFO L225 Difference]: With dead ends: 12764 [2021-02-19 17:36:03,451 INFO L226 Difference]: Without dead ends: 12616 [2021-02-19 17:36:03,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-02-19 17:36:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 12484. [2021-02-19 17:36:03,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 4.215893615316831) internal successors, (52627), 12483 states have internal predecessors, (52627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 52627 transitions. [2021-02-19 17:36:03,743 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 52627 transitions. Word has length 27 [2021-02-19 17:36:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:03,743 INFO L480 AbstractCegarLoop]: Abstraction has 12484 states and 52627 transitions. [2021-02-19 17:36:03,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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) [2021-02-19 17:36:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 52627 transitions. [2021-02-19 17:36:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:03,764 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:03,764 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:03,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:36:03,965 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash 162611110, now seen corresponding path program 4 times [2021-02-19 17:36:03,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:03,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932726668] [2021-02-19 17:36:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932726668] [2021-02-19 17:36:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473409082] [2021-02-19 17:36:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:04,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:04,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:04,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:04,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:04,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:36:04,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691690320] [2021-02-19 17:36:04,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:04,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:04,134 INFO L87 Difference]: Start difference. First operand 12484 states and 52627 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:36:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:04,377 INFO L93 Difference]: Finished difference Result 13344 states and 55451 transitions. [2021-02-19 17:36:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-02-19 17:36:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:04,409 INFO L225 Difference]: With dead ends: 13344 [2021-02-19 17:36:04,409 INFO L226 Difference]: Without dead ends: 12916 [2021-02-19 17:36:04,409 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2021-02-19 17:36:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 12072. [2021-02-19 17:36:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12072 states, 12071 states have (on average 4.212327064866209) internal successors, (50847), 12071 states have internal predecessors, (50847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12072 states to 12072 states and 50847 transitions. [2021-02-19 17:36:04,642 INFO L78 Accepts]: Start accepts. Automaton has 12072 states and 50847 transitions. Word has length 27 [2021-02-19 17:36:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:04,643 INFO L480 AbstractCegarLoop]: Abstraction has 12072 states and 50847 transitions. [2021-02-19 17:36:04,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:36:04,643 INFO L276 IsEmpty]: Start isEmpty. Operand 12072 states and 50847 transitions. [2021-02-19 17:36:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:04,664 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:04,664 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:04,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:04,865 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:04,865 INFO L82 PathProgramCache]: Analyzing trace with hash 411567542, now seen corresponding path program 5 times [2021-02-19 17:36:04,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:04,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943870671] [2021-02-19 17:36:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:04,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943870671] [2021-02-19 17:36:04,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309594300] [2021-02-19 17:36:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:04,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:36:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:04,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:05,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:05,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:36:05,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166349861] [2021-02-19 17:36:05,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:36:05,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:36:05,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:05,036 INFO L87 Difference]: Start difference. First operand 12072 states and 50847 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-02-19 17:36:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:05,208 INFO L93 Difference]: Finished difference Result 12692 states and 53003 transitions. [2021-02-19 17:36:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:36:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 27 [2021-02-19 17:36:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:05,241 INFO L225 Difference]: With dead ends: 12692 [2021-02-19 17:36:05,241 INFO L226 Difference]: Without dead ends: 12544 [2021-02-19 17:36:05,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12544 states. [2021-02-19 17:36:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12544 to 12224. [2021-02-19 17:36:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 12223 states have (on average 4.211813793667676) internal successors, (51481), 12223 states have internal predecessors, (51481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 51481 transitions. [2021-02-19 17:36:05,500 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 51481 transitions. Word has length 27 [2021-02-19 17:36:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:05,500 INFO L480 AbstractCegarLoop]: Abstraction has 12224 states and 51481 transitions. [2021-02-19 17:36:05,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-02-19 17:36:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 51481 transitions. [2021-02-19 17:36:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:05,521 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:05,522 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:05,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 17:36:05,722 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1678001426, now seen corresponding path program 6 times [2021-02-19 17:36:05,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:05,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540330960] [2021-02-19 17:36:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:05,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540330960] [2021-02-19 17:36:05,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221986996] [2021-02-19 17:36:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:05,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:36:05,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:05,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:05,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:05,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:36:05,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566453324] [2021-02-19 17:36:05,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:05,883 INFO L87 Difference]: Start difference. First operand 12224 states and 51481 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 17:36:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:06,173 INFO L93 Difference]: Finished difference Result 13227 states and 54835 transitions. [2021-02-19 17:36:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 27 [2021-02-19 17:36:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:06,209 INFO L225 Difference]: With dead ends: 13227 [2021-02-19 17:36:06,209 INFO L226 Difference]: Without dead ends: 12883 [2021-02-19 17:36:06,209 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-02-19 17:36:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 12275. [2021-02-19 17:36:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 4.194150236271794) internal successors, (51479), 12274 states have internal predecessors, (51479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 51479 transitions. [2021-02-19 17:36:06,462 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 51479 transitions. Word has length 27 [2021-02-19 17:36:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:06,462 INFO L480 AbstractCegarLoop]: Abstraction has 12275 states and 51479 transitions. [2021-02-19 17:36:06,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-02-19 17:36:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 51479 transitions. [2021-02-19 17:36:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:06,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:06,484 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:06,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 17:36:06,685 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 264444530, now seen corresponding path program 7 times [2021-02-19 17:36:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:06,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231082064] [2021-02-19 17:36:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:36:06,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231082064] [2021-02-19 17:36:06,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:36:06,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:36:06,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906151278] [2021-02-19 17:36:06,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:36:06,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:36:06,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:36:06,723 INFO L87 Difference]: Start difference. First operand 12275 states and 51479 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:06,848 INFO L93 Difference]: Finished difference Result 12977 states and 53915 transitions. [2021-02-19 17:36:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:36:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:36:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:06,878 INFO L225 Difference]: With dead ends: 12977 [2021-02-19 17:36:06,879 INFO L226 Difference]: Without dead ends: 12779 [2021-02-19 17:36:06,879 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:36:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2021-02-19 17:36:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 12283. [2021-02-19 17:36:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 4.204934049829018) internal successors, (51645), 12282 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 51645 transitions. [2021-02-19 17:36:07,114 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 51645 transitions. Word has length 27 [2021-02-19 17:36:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:07,114 INFO L480 AbstractCegarLoop]: Abstraction has 12283 states and 51645 transitions. [2021-02-19 17:36:07,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 51645 transitions. [2021-02-19 17:36:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:07,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:07,135 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:07,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-02-19 17:36:07,135 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash 89086370, now seen corresponding path program 8 times [2021-02-19 17:36:07,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:07,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288079742] [2021-02-19 17:36:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:07,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288079742] [2021-02-19 17:36:07,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903540994] [2021-02-19 17:36:07,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:07,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:07,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:07,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:07,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:07,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:07,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:36:07,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262913361] [2021-02-19 17:36:07,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:36:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:36:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:07,292 INFO L87 Difference]: Start difference. First operand 12283 states and 51645 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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) [2021-02-19 17:36:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:07,499 INFO L93 Difference]: Finished difference Result 12839 states and 53665 transitions. [2021-02-19 17:36:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:36:07,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27 [2021-02-19 17:36:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:07,533 INFO L225 Difference]: With dead ends: 12839 [2021-02-19 17:36:07,534 INFO L226 Difference]: Without dead ends: 12707 [2021-02-19 17:36:07,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-02-19 17:36:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12503. [2021-02-19 17:36:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12502 states have (on average 4.2051671732522795) internal successors, (52573), 12502 states have internal predecessors, (52573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 52573 transitions. [2021-02-19 17:36:07,774 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 52573 transitions. Word has length 27 [2021-02-19 17:36:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:07,774 INFO L480 AbstractCegarLoop]: Abstraction has 12503 states and 52573 transitions. [2021-02-19 17:36:07,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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) [2021-02-19 17:36:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 52573 transitions. [2021-02-19 17:36:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:07,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:07,796 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:07,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:07,996 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash -576277058, now seen corresponding path program 9 times [2021-02-19 17:36:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:07,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486093274] [2021-02-19 17:36:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:36:08,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486093274] [2021-02-19 17:36:08,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258755488] [2021-02-19 17:36:08,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:08,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:36:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:08,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:08,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:36:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452274210] [2021-02-19 17:36:08,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:08,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:08,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:08,157 INFO L87 Difference]: Start difference. First operand 12503 states and 52573 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:36:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:08,436 INFO L93 Difference]: Finished difference Result 13523 states and 55911 transitions. [2021-02-19 17:36:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-02-19 17:36:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:08,471 INFO L225 Difference]: With dead ends: 13523 [2021-02-19 17:36:08,471 INFO L226 Difference]: Without dead ends: 13127 [2021-02-19 17:36:08,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-02-19 17:36:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12123. [2021-02-19 17:36:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 4.2003794753341035) internal successors, (50917), 12122 states have internal predecessors, (50917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 50917 transitions. [2021-02-19 17:36:08,713 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 50917 transitions. Word has length 27 [2021-02-19 17:36:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:08,713 INFO L480 AbstractCegarLoop]: Abstraction has 12123 states and 50917 transitions. [2021-02-19 17:36:08,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:36:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 50917 transitions. [2021-02-19 17:36:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:08,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:08,734 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:08,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 17:36:08,934 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash 438744050, now seen corresponding path program 15 times [2021-02-19 17:36:08,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:08,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623460949] [2021-02-19 17:36:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:36:08,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623460949] [2021-02-19 17:36:08,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894177156] [2021-02-19 17:36:08,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:08,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:36:08,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:09,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:09,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:36:09,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658091009] [2021-02-19 17:36:09,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:36:09,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:09,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:36:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:09,078 INFO L87 Difference]: Start difference. First operand 12123 states and 50917 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-02-19 17:36:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:09,275 INFO L93 Difference]: Finished difference Result 13671 states and 56537 transitions. [2021-02-19 17:36:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:36:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 27 [2021-02-19 17:36:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:09,306 INFO L225 Difference]: With dead ends: 13671 [2021-02-19 17:36:09,307 INFO L226 Difference]: Without dead ends: 13603 [2021-02-19 17:36:09,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2021-02-19 17:36:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 12633. [2021-02-19 17:36:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12632 states have (on average 4.193635212159594) internal successors, (52974), 12632 states have internal predecessors, (52974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 52974 transitions. [2021-02-19 17:36:09,550 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 52974 transitions. Word has length 27 [2021-02-19 17:36:09,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:09,550 INFO L480 AbstractCegarLoop]: Abstraction has 12633 states and 52974 transitions. [2021-02-19 17:36:09,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-02-19 17:36:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 52974 transitions. [2021-02-19 17:36:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:09,571 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:09,571 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:09,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:09,772 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1447721310, now seen corresponding path program 13 times [2021-02-19 17:36:09,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:09,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263642392] [2021-02-19 17:36:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:09,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263642392] [2021-02-19 17:36:09,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082167352] [2021-02-19 17:36:09,802 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 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 [2021-02-19 17:36:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:09,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:09,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:09,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:36:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953125378] [2021-02-19 17:36:09,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:36:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:36:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:09,905 INFO L87 Difference]: Start difference. First operand 12633 states and 52974 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-02-19 17:36:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:10,082 INFO L93 Difference]: Finished difference Result 13876 states and 57371 transitions. [2021-02-19 17:36:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:36:10,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 27 [2021-02-19 17:36:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:10,115 INFO L225 Difference]: With dead ends: 13876 [2021-02-19 17:36:10,115 INFO L226 Difference]: Without dead ends: 13825 [2021-02-19 17:36:10,115 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-02-19 17:36:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13229. [2021-02-19 17:36:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13228 states have (on average 4.175839129120049) internal successors, (55238), 13228 states have internal predecessors, (55238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 55238 transitions. [2021-02-19 17:36:10,354 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 55238 transitions. Word has length 27 [2021-02-19 17:36:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:10,354 INFO L480 AbstractCegarLoop]: Abstraction has 13229 states and 55238 transitions. [2021-02-19 17:36:10,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-02-19 17:36:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 55238 transitions. [2021-02-19 17:36:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:10,377 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:10,378 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:10,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 17:36:10,579 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 662306130, now seen corresponding path program 14 times [2021-02-19 17:36:10,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:10,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440680366] [2021-02-19 17:36:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:36:10,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440680366] [2021-02-19 17:36:10,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030552719] [2021-02-19 17:36:10,607 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:10,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:10,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:10,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:10,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-02-19 17:36:10,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170115301] [2021-02-19 17:36:10,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:36:10,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:36:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:10,727 INFO L87 Difference]: Start difference. First operand 13229 states and 55238 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:36:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:10,986 INFO L93 Difference]: Finished difference Result 14694 states and 60468 transitions. [2021-02-19 17:36:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:36:10,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-02-19 17:36:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:11,023 INFO L225 Difference]: With dead ends: 14694 [2021-02-19 17:36:11,023 INFO L226 Difference]: Without dead ends: 14592 [2021-02-19 17:36:11,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:36:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-02-19 17:36:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 13580. [2021-02-19 17:36:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13580 states, 13579 states have (on average 4.172472199720156) internal successors, (56658), 13579 states have internal predecessors, (56658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 56658 transitions. [2021-02-19 17:36:11,267 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 56658 transitions. Word has length 27 [2021-02-19 17:36:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:11,267 INFO L480 AbstractCegarLoop]: Abstraction has 13580 states and 56658 transitions. [2021-02-19 17:36:11,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:36:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 56658 transitions. [2021-02-19 17:36:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:36:11,290 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:11,290 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:11,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 17:36:11,491 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1389086802, now seen corresponding path program 15 times [2021-02-19 17:36:11,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:11,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592953385] [2021-02-19 17:36:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:36:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592953385] [2021-02-19 17:36:11,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225166605] [2021-02-19 17:36:11,517 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 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 [2021-02-19 17:36:11,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:36:11,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:36:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:11,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:11,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:36:11,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152127136] [2021-02-19 17:36:11,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:36:11,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:36:11,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:11,608 INFO L87 Difference]: Start difference. First operand 13580 states and 56658 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-02-19 17:36:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:11,788 INFO L93 Difference]: Finished difference Result 14707 states and 60689 transitions. [2021-02-19 17:36:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:36:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 27 [2021-02-19 17:36:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:11,822 INFO L225 Difference]: With dead ends: 14707 [2021-02-19 17:36:11,822 INFO L226 Difference]: Without dead ends: 14656 [2021-02-19 17:36:11,822 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:36:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-02-19 17:36:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14011. [2021-02-19 17:36:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14011 states, 14010 states have (on average 4.164596716630978) internal successors, (58346), 14010 states have internal predecessors, (58346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14011 states to 14011 states and 58346 transitions. [2021-02-19 17:36:12,118 INFO L78 Accepts]: Start accepts. Automaton has 14011 states and 58346 transitions. Word has length 27 [2021-02-19 17:36:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:12,118 INFO L480 AbstractCegarLoop]: Abstraction has 14011 states and 58346 transitions. [2021-02-19 17:36:12,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-02-19 17:36:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 14011 states and 58346 transitions. [2021-02-19 17:36:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:12,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:12,141 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:12,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 17:36:12,342 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:12,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1989624744, now seen corresponding path program 16 times [2021-02-19 17:36:12,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:12,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116218643] [2021-02-19 17:36:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:12,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116218643] [2021-02-19 17:36:12,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655309220] [2021-02-19 17:36:12,370 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 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 [2021-02-19 17:36:12,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:12,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:12,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:12,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:12,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:36:12,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104560429] [2021-02-19 17:36:12,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:12,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:12,457 INFO L87 Difference]: Start difference. First operand 14011 states and 58346 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 17:36:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:13,389 INFO L93 Difference]: Finished difference Result 35846 states and 143690 transitions. [2021-02-19 17:36:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:36:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 29 [2021-02-19 17:36:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:13,480 INFO L225 Difference]: With dead ends: 35846 [2021-02-19 17:36:13,480 INFO L226 Difference]: Without dead ends: 35846 [2021-02-19 17:36:13,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:36:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-02-19 17:36:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 13413. [2021-02-19 17:36:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 4.137339695794811) internal successors, (55490), 13412 states have internal predecessors, (55490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 55490 transitions. [2021-02-19 17:36:13,846 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 55490 transitions. Word has length 29 [2021-02-19 17:36:13,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:13,846 INFO L480 AbstractCegarLoop]: Abstraction has 13413 states and 55490 transitions. [2021-02-19 17:36:13,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 17:36:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 55490 transitions. [2021-02-19 17:36:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:13,869 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:13,869 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:14,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 17:36:14,069 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash -576281000, now seen corresponding path program 17 times [2021-02-19 17:36:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:14,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777125922] [2021-02-19 17:36:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777125922] [2021-02-19 17:36:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075492777] [2021-02-19 17:36:14,099 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 [2021-02-19 17:36:14,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:36:14,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:14,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:14,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:36:14,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839353024] [2021-02-19 17:36:14,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:14,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:14,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:14,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:14,182 INFO L87 Difference]: Start difference. First operand 13413 states and 55490 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 17:36:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:14,646 INFO L93 Difference]: Finished difference Result 29402 states and 114209 transitions. [2021-02-19 17:36:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:36:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 29 [2021-02-19 17:36:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:14,713 INFO L225 Difference]: With dead ends: 29402 [2021-02-19 17:36:14,713 INFO L226 Difference]: Without dead ends: 29122 [2021-02-19 17:36:14,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:36:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-02-19 17:36:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 16597. [2021-02-19 17:36:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16597 states, 16596 states have (on average 4.1867317425885755) internal successors, (69483), 16596 states have internal predecessors, (69483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16597 states to 16597 states and 69483 transitions. [2021-02-19 17:36:15,071 INFO L78 Accepts]: Start accepts. Automaton has 16597 states and 69483 transitions. Word has length 29 [2021-02-19 17:36:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:15,071 INFO L480 AbstractCegarLoop]: Abstraction has 16597 states and 69483 transitions. [2021-02-19 17:36:15,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-02-19 17:36:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 16597 states and 69483 transitions. [2021-02-19 17:36:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:15,099 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:15,099 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:15,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:15,301 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:15,301 INFO L82 PathProgramCache]: Analyzing trace with hash -387958732, now seen corresponding path program 18 times [2021-02-19 17:36:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:15,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799482295] [2021-02-19 17:36:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:15,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799482295] [2021-02-19 17:36:15,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757738176] [2021-02-19 17:36:15,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:36:15,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:36:15,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:15,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:15,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:15,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:15,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:15,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232313723] [2021-02-19 17:36:15,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:15,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:15,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:15,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:15,408 INFO L87 Difference]: Start difference. First operand 16597 states and 69483 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) [2021-02-19 17:36:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:15,850 INFO L93 Difference]: Finished difference Result 29479 states and 115492 transitions. [2021-02-19 17:36:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:36:15,851 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 29 [2021-02-19 17:36:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:15,921 INFO L225 Difference]: With dead ends: 29479 [2021-02-19 17:36:15,921 INFO L226 Difference]: Without dead ends: 29479 [2021-02-19 17:36:15,922 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:36:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2021-02-19 17:36:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 16486. [2021-02-19 17:36:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16486 states, 16485 states have (on average 4.176038823172581) internal successors, (68842), 16485 states have internal predecessors, (68842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16486 states to 16486 states and 68842 transitions. [2021-02-19 17:36:16,327 INFO L78 Accepts]: Start accepts. Automaton has 16486 states and 68842 transitions. Word has length 29 [2021-02-19 17:36:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:16,328 INFO L480 AbstractCegarLoop]: Abstraction has 16486 states and 68842 transitions. [2021-02-19 17:36:16,328 INFO L481 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) [2021-02-19 17:36:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 16486 states and 68842 transitions. [2021-02-19 17:36:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:16,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:16,356 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:16,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 17:36:16,556 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash 58652144, now seen corresponding path program 19 times [2021-02-19 17:36:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:16,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424565325] [2021-02-19 17:36:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:16,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424565325] [2021-02-19 17:36:16,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189638772] [2021-02-19 17:36:16,579 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 [2021-02-19 17:36:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:16,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:16,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:16,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:16,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781134753] [2021-02-19 17:36:16,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:16,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:16,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:16,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:16,673 INFO L87 Difference]: Start difference. First operand 16486 states and 68842 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) [2021-02-19 17:36:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:17,022 INFO L93 Difference]: Finished difference Result 21742 states and 87217 transitions. [2021-02-19 17:36:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:36:17,023 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 29 [2021-02-19 17:36:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:17,070 INFO L225 Difference]: With dead ends: 21742 [2021-02-19 17:36:17,070 INFO L226 Difference]: Without dead ends: 21722 [2021-02-19 17:36:17,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:36:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21722 states. [2021-02-19 17:36:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21722 to 16564. [2021-02-19 17:36:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16564 states, 16563 states have (on average 4.172372154802874) internal successors, (69107), 16563 states have internal predecessors, (69107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 69107 transitions. [2021-02-19 17:36:17,397 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 69107 transitions. Word has length 29 [2021-02-19 17:36:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:17,398 INFO L480 AbstractCegarLoop]: Abstraction has 16564 states and 69107 transitions. [2021-02-19 17:36:17,398 INFO L481 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) [2021-02-19 17:36:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 69107 transitions. [2021-02-19 17:36:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:17,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:17,424 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:17,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:17,625 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1828735756, now seen corresponding path program 20 times [2021-02-19 17:36:17,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:17,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020100557] [2021-02-19 17:36:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020100557] [2021-02-19 17:36:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953866104] [2021-02-19 17:36:17,646 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) [2021-02-19 17:36:17,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:17,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:17,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:17,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:17,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499421570] [2021-02-19 17:36:17,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:17,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:17,739 INFO L87 Difference]: Start difference. First operand 16564 states and 69107 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-02-19 17:36:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:18,258 INFO L93 Difference]: Finished difference Result 55537 states and 222253 transitions. [2021-02-19 17:36:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:36:18,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 29 [2021-02-19 17:36:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:18,405 INFO L225 Difference]: With dead ends: 55537 [2021-02-19 17:36:18,406 INFO L226 Difference]: Without dead ends: 55537 [2021-02-19 17:36:18,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:36:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55537 states. [2021-02-19 17:36:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55537 to 21381. [2021-02-19 17:36:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286623012160898) internal successors, (91648), 21380 states have internal predecessors, (91648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91648 transitions. [2021-02-19 17:36:19,028 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91648 transitions. Word has length 29 [2021-02-19 17:36:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:19,028 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91648 transitions. [2021-02-19 17:36:19,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-02-19 17:36:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91648 transitions. [2021-02-19 17:36:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:19,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:19,064 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:19,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:19,268 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 958631284, now seen corresponding path program 21 times [2021-02-19 17:36:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:19,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956711985] [2021-02-19 17:36:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:19,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956711985] [2021-02-19 17:36:19,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330627057] [2021-02-19 17:36:19,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:19,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:36:19,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:19,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:19,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:19,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:19,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664042260] [2021-02-19 17:36:19,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:19,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:19,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:19,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:19,387 INFO L87 Difference]: Start difference. First operand 21381 states and 91648 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-02-19 17:36:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:19,968 INFO L93 Difference]: Finished difference Result 35555 states and 142585 transitions. [2021-02-19 17:36:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:36:19,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 29 [2021-02-19 17:36:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:20,057 INFO L225 Difference]: With dead ends: 35555 [2021-02-19 17:36:20,057 INFO L226 Difference]: Without dead ends: 35499 [2021-02-19 17:36:20,057 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:36:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35499 states. [2021-02-19 17:36:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35499 to 21381. [2021-02-19 17:36:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286155285313377) internal successors, (91638), 21380 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91638 transitions. [2021-02-19 17:36:20,543 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91638 transitions. Word has length 29 [2021-02-19 17:36:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:20,543 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91638 transitions. [2021-02-19 17:36:20,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-02-19 17:36:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91638 transitions. [2021-02-19 17:36:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:20,582 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:20,582 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:20,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 17:36:20,783 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash -100321296, now seen corresponding path program 22 times [2021-02-19 17:36:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:20,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356902826] [2021-02-19 17:36:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:20,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356902826] [2021-02-19 17:36:20,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473058980] [2021-02-19 17:36:20,807 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 [2021-02-19 17:36:20,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:20,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:20,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:20,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:20,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466639736] [2021-02-19 17:36:20,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:20,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:20,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:20,912 INFO L87 Difference]: Start difference. First operand 21381 states and 91638 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) [2021-02-19 17:36:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:21,477 INFO L93 Difference]: Finished difference Result 42043 states and 168835 transitions. [2021-02-19 17:36:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:36:21,477 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 29 [2021-02-19 17:36:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:21,581 INFO L225 Difference]: With dead ends: 42043 [2021-02-19 17:36:21,581 INFO L226 Difference]: Without dead ends: 42043 [2021-02-19 17:36:21,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:36:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42043 states. [2021-02-19 17:36:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42043 to 21474. [2021-02-19 17:36:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21474 states, 21473 states have (on average 4.284776230615191) internal successors, (92007), 21473 states have internal predecessors, (92007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 92007 transitions. [2021-02-19 17:36:22,116 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 92007 transitions. Word has length 29 [2021-02-19 17:36:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:22,116 INFO L480 AbstractCegarLoop]: Abstraction has 21474 states and 92007 transitions. [2021-02-19 17:36:22,116 INFO L481 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) [2021-02-19 17:36:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 92007 transitions. [2021-02-19 17:36:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:22,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:22,155 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:22,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:22,355 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash 346289580, now seen corresponding path program 23 times [2021-02-19 17:36:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:22,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482168561] [2021-02-19 17:36:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:22,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482168561] [2021-02-19 17:36:22,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675581514] [2021-02-19 17:36:22,377 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) [2021-02-19 17:36:22,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:36:22,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:22,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:22,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:22,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962908477] [2021-02-19 17:36:22,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:22,471 INFO L87 Difference]: Start difference. First operand 21474 states and 92007 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) [2021-02-19 17:36:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:22,939 INFO L93 Difference]: Finished difference Result 42315 states and 169746 transitions. [2021-02-19 17:36:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:36:22,940 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 29 [2021-02-19 17:36:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:23,044 INFO L225 Difference]: With dead ends: 42315 [2021-02-19 17:36:23,044 INFO L226 Difference]: Without dead ends: 42275 [2021-02-19 17:36:23,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:36:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42275 states. [2021-02-19 17:36:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42275 to 21484. [2021-02-19 17:36:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 4.284038542103058) internal successors, (92034), 21483 states have internal predecessors, (92034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 92034 transitions. [2021-02-19 17:36:23,553 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 92034 transitions. Word has length 29 [2021-02-19 17:36:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:23,553 INFO L480 AbstractCegarLoop]: Abstraction has 21484 states and 92034 transitions. [2021-02-19 17:36:23,553 INFO L481 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) [2021-02-19 17:36:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 92034 transitions. [2021-02-19 17:36:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:23,588 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:23,588 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:23,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 17:36:23,788 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash -369067724, now seen corresponding path program 24 times [2021-02-19 17:36:23,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:23,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088825083] [2021-02-19 17:36:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:23,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088825083] [2021-02-19 17:36:23,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427155952] [2021-02-19 17:36:23,813 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) [2021-02-19 17:36:23,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:36:23,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:23,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:23,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:36:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399825650] [2021-02-19 17:36:23,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:36:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:36:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:36:23,922 INFO L87 Difference]: Start difference. First operand 21484 states and 92034 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) [2021-02-19 17:36:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:24,553 INFO L93 Difference]: Finished difference Result 36111 states and 146587 transitions. [2021-02-19 17:36:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:36:24,553 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 29 [2021-02-19 17:36:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:24,643 INFO L225 Difference]: With dead ends: 36111 [2021-02-19 17:36:24,643 INFO L226 Difference]: Without dead ends: 36111 [2021-02-19 17:36:24,644 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:36:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36111 states. [2021-02-19 17:36:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36111 to 20508. [2021-02-19 17:36:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 20507 states have (on average 4.257131711123031) internal successors, (87301), 20507 states have internal predecessors, (87301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 87301 transitions. [2021-02-19 17:36:25,120 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 87301 transitions. Word has length 29 [2021-02-19 17:36:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:25,120 INFO L480 AbstractCegarLoop]: Abstraction has 20508 states and 87301 transitions. [2021-02-19 17:36:25,120 INFO L481 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) [2021-02-19 17:36:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 87301 transitions. [2021-02-19 17:36:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:25,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:25,153 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:25,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:25,354 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2090653586, now seen corresponding path program 25 times [2021-02-19 17:36:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932976169] [2021-02-19 17:36:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:25,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932976169] [2021-02-19 17:36:25,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533622147] [2021-02-19 17:36:25,378 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) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:25,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:25,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:25,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:36:25,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715653227] [2021-02-19 17:36:25,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:36:25,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:25,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:36:25,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:36:25,468 INFO L87 Difference]: Start difference. First operand 20508 states and 87301 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) [2021-02-19 17:36:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:25,948 INFO L93 Difference]: Finished difference Result 36261 states and 145187 transitions. [2021-02-19 17:36:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:36:25,949 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 29 [2021-02-19 17:36:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:26,036 INFO L225 Difference]: With dead ends: 36261 [2021-02-19 17:36:26,037 INFO L226 Difference]: Without dead ends: 36201 [2021-02-19 17:36:26,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:36:26,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36201 states. [2021-02-19 17:36:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36201 to 20844. [2021-02-19 17:36:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 20843 states have (on average 4.25269874778103) internal successors, (88639), 20843 states have internal predecessors, (88639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 88639 transitions. [2021-02-19 17:36:26,508 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 88639 transitions. Word has length 29 [2021-02-19 17:36:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:26,508 INFO L480 AbstractCegarLoop]: Abstraction has 20844 states and 88639 transitions. [2021-02-19 17:36:26,508 INFO L481 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) [2021-02-19 17:36:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 88639 transitions. [2021-02-19 17:36:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:26,543 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:26,543 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:26,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 17:36:26,744 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1499342920, now seen corresponding path program 26 times [2021-02-19 17:36:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:26,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257390855] [2021-02-19 17:36:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:26,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257390855] [2021-02-19 17:36:26,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019428801] [2021-02-19 17:36:26,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:26,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:26,984 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-02-19 17:36:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:27,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:27,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:36:27,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238895459] [2021-02-19 17:36:27,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:36:27,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:36:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:36:27,047 INFO L87 Difference]: Start difference. First operand 20844 states and 88639 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:27,707 INFO L93 Difference]: Finished difference Result 44495 states and 179467 transitions. [2021-02-19 17:36:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:36:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:27,824 INFO L225 Difference]: With dead ends: 44495 [2021-02-19 17:36:27,824 INFO L226 Difference]: Without dead ends: 44495 [2021-02-19 17:36:27,824 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:36:27,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44495 states. [2021-02-19 17:36:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44495 to 20105. [2021-02-19 17:36:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20105 states, 20104 states have (on average 4.225875447672105) internal successors, (84957), 20104 states have internal predecessors, (84957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 84957 transitions. [2021-02-19 17:36:28,346 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 84957 transitions. Word has length 29 [2021-02-19 17:36:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:28,346 INFO L480 AbstractCegarLoop]: Abstraction has 20105 states and 84957 transitions. [2021-02-19 17:36:28,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 84957 transitions. [2021-02-19 17:36:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:28,381 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:28,381 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:28,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 17:36:28,581 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:28,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1395757112, now seen corresponding path program 27 times [2021-02-19 17:36:28,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:28,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205473580] [2021-02-19 17:36:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:28,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205473580] [2021-02-19 17:36:28,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905629336] [2021-02-19 17:36:28,604 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 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 [2021-02-19 17:36:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:36:28,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:28,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:28,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:36:28,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653917282] [2021-02-19 17:36:28,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:36:28,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:28,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:36:28,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:36:28,703 INFO L87 Difference]: Start difference. First operand 20105 states and 84957 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:29,186 INFO L93 Difference]: Finished difference Result 29398 states and 116855 transitions. [2021-02-19 17:36:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:36:29,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:29,257 INFO L225 Difference]: With dead ends: 29398 [2021-02-19 17:36:29,257 INFO L226 Difference]: Without dead ends: 29314 [2021-02-19 17:36:29,257 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:36:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29314 states. [2021-02-19 17:36:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29314 to 19357. [2021-02-19 17:36:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19357 states, 19356 states have (on average 4.232434387270097) internal successors, (81923), 19356 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19357 states to 19357 states and 81923 transitions. [2021-02-19 17:36:29,648 INFO L78 Accepts]: Start accepts. Automaton has 19357 states and 81923 transitions. Word has length 29 [2021-02-19 17:36:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:29,648 INFO L480 AbstractCegarLoop]: Abstraction has 19357 states and 81923 transitions. [2021-02-19 17:36:29,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:29,648 INFO L276 IsEmpty]: Start isEmpty. Operand 19357 states and 81923 transitions. [2021-02-19 17:36:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:29,681 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:29,681 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:29,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 17:36:29,881 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:29,882 INFO L82 PathProgramCache]: Analyzing trace with hash 926814068, now seen corresponding path program 28 times [2021-02-19 17:36:29,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:29,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591940839] [2021-02-19 17:36:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591940839] [2021-02-19 17:36:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115146550] [2021-02-19 17:36:29,903 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) [2021-02-19 17:36:29,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:29,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:29,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716595617] [2021-02-19 17:36:29,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:29,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:29,990 INFO L87 Difference]: Start difference. First operand 19357 states and 81923 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:30,450 INFO L93 Difference]: Finished difference Result 39779 states and 158195 transitions. [2021-02-19 17:36:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:36:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:30,558 INFO L225 Difference]: With dead ends: 39779 [2021-02-19 17:36:30,558 INFO L226 Difference]: Without dead ends: 39779 [2021-02-19 17:36:30,558 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:36:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-02-19 17:36:31,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 20557. [2021-02-19 17:36:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20557 states, 20556 states have (on average 4.262502432379841) internal successors, (87620), 20556 states have internal predecessors, (87620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 87620 transitions. [2021-02-19 17:36:31,117 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 87620 transitions. Word has length 29 [2021-02-19 17:36:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:31,118 INFO L480 AbstractCegarLoop]: Abstraction has 20557 states and 87620 transitions. [2021-02-19 17:36:31,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 87620 transitions. [2021-02-19 17:36:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:31,155 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:31,156 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:31,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 17:36:31,356 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:31,356 INFO L82 PathProgramCache]: Analyzing trace with hash -580786188, now seen corresponding path program 29 times [2021-02-19 17:36:31,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:31,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130208819] [2021-02-19 17:36:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130208819] [2021-02-19 17:36:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925172360] [2021-02-19 17:36:31,382 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) [2021-02-19 17:36:31,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:36:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:31,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:31,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:31,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305089804] [2021-02-19 17:36:31,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:31,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:31,469 INFO L87 Difference]: Start difference. First operand 20557 states and 87620 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:31,895 INFO L93 Difference]: Finished difference Result 27775 states and 112554 transitions. [2021-02-19 17:36:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:36:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:31,968 INFO L225 Difference]: With dead ends: 27775 [2021-02-19 17:36:31,968 INFO L226 Difference]: Without dead ends: 27747 [2021-02-19 17:36:31,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:36:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-02-19 17:36:32,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 20546. [2021-02-19 17:36:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20546 states, 20545 states have (on average 4.26186420053541) internal successors, (87560), 20545 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20546 states to 20546 states and 87560 transitions. [2021-02-19 17:36:32,395 INFO L78 Accepts]: Start accepts. Automaton has 20546 states and 87560 transitions. Word has length 29 [2021-02-19 17:36:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:32,395 INFO L480 AbstractCegarLoop]: Abstraction has 20546 states and 87560 transitions. [2021-02-19 17:36:32,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 20546 states and 87560 transitions. [2021-02-19 17:36:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:32,429 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:32,429 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:32,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:32,629 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1639738768, now seen corresponding path program 30 times [2021-02-19 17:36:32,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:32,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553666560] [2021-02-19 17:36:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:32,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553666560] [2021-02-19 17:36:32,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715866436] [2021-02-19 17:36:32,651 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 [2021-02-19 17:36:32,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:36:32,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:32,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:32,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:32,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:32,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362944668] [2021-02-19 17:36:32,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:32,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:32,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:32,738 INFO L87 Difference]: Start difference. First operand 20546 states and 87560 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:33,278 INFO L93 Difference]: Finished difference Result 31505 states and 127549 transitions. [2021-02-19 17:36:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:36:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:33,357 INFO L225 Difference]: With dead ends: 31505 [2021-02-19 17:36:33,358 INFO L226 Difference]: Without dead ends: 31505 [2021-02-19 17:36:33,358 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:36:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2021-02-19 17:36:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 20639. [2021-02-19 17:36:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.2605388119003775) internal successors, (87929), 20638 states have internal predecessors, (87929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:33,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87929 transitions. [2021-02-19 17:36:33,797 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87929 transitions. Word has length 29 [2021-02-19 17:36:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:33,797 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87929 transitions. [2021-02-19 17:36:33,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87929 transitions. [2021-02-19 17:36:33,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:33,832 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:33,832 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:34,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-02-19 17:36:34,033 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1193127892, now seen corresponding path program 31 times [2021-02-19 17:36:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:34,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397370725] [2021-02-19 17:36:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:34,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397370725] [2021-02-19 17:36:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321362914] [2021-02-19 17:36:34,054 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 [2021-02-19 17:36:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:34,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:34,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:34,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:34,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055124534] [2021-02-19 17:36:34,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:34,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:34,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:34,139 INFO L87 Difference]: Start difference. First operand 20639 states and 87929 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:34,643 INFO L93 Difference]: Finished difference Result 38173 states and 150936 transitions. [2021-02-19 17:36:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:36:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:34,737 INFO L225 Difference]: With dead ends: 38173 [2021-02-19 17:36:34,737 INFO L226 Difference]: Without dead ends: 38153 [2021-02-19 17:36:34,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:36:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38153 states. [2021-02-19 17:36:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38153 to 20639. [2021-02-19 17:36:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.260054268824499) internal successors, (87919), 20638 states have internal predecessors, (87919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87919 transitions. [2021-02-19 17:36:35,196 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87919 transitions. Word has length 29 [2021-02-19 17:36:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:35,196 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87919 transitions. [2021-02-19 17:36:35,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87919 transitions. [2021-02-19 17:36:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:35,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:35,230 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:35,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:35,431 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1908485196, now seen corresponding path program 32 times [2021-02-19 17:36:35,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:35,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121925737] [2021-02-19 17:36:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121925737] [2021-02-19 17:36:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979839893] [2021-02-19 17:36:35,454 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 [2021-02-19 17:36:35,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:35,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:35,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:35,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:35,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:35,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290582847] [2021-02-19 17:36:35,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:35,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:35,550 INFO L87 Difference]: Start difference. First operand 20639 states and 87919 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:36,693 INFO L93 Difference]: Finished difference Result 44621 states and 181666 transitions. [2021-02-19 17:36:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 17:36:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:36,809 INFO L225 Difference]: With dead ends: 44621 [2021-02-19 17:36:36,809 INFO L226 Difference]: Without dead ends: 44621 [2021-02-19 17:36:36,810 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 17:36:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44621 states. [2021-02-19 17:36:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44621 to 21011. [2021-02-19 17:36:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 4.254878629224179) internal successors, (89395), 21010 states have internal predecessors, (89395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 89395 transitions. [2021-02-19 17:36:37,344 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 89395 transitions. Word has length 29 [2021-02-19 17:36:37,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:37,345 INFO L480 AbstractCegarLoop]: Abstraction has 21011 states and 89395 transitions. [2021-02-19 17:36:37,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 89395 transitions. [2021-02-19 17:36:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:37,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:37,382 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:37,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:37,583 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash 551236114, now seen corresponding path program 33 times [2021-02-19 17:36:37,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:37,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423329996] [2021-02-19 17:36:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423329996] [2021-02-19 17:36:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291675295] [2021-02-19 17:36:37,604 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) [2021-02-19 17:36:37,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:36:37,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:37,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:37,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:37,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906333700] [2021-02-19 17:36:37,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:37,705 INFO L87 Difference]: Start difference. First operand 21011 states and 89395 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:38,270 INFO L93 Difference]: Finished difference Result 44719 states and 175059 transitions. [2021-02-19 17:36:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:36:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:38,377 INFO L225 Difference]: With dead ends: 44719 [2021-02-19 17:36:38,377 INFO L226 Difference]: Without dead ends: 44519 [2021-02-19 17:36:38,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:36:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44519 states. [2021-02-19 17:36:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44519 to 21017. [2021-02-19 17:36:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 4.253235629996193) internal successors, (89386), 21016 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:38,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 89386 transitions. [2021-02-19 17:36:38,939 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 89386 transitions. Word has length 29 [2021-02-19 17:36:38,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:38,939 INFO L480 AbstractCegarLoop]: Abstraction has 21017 states and 89386 transitions. [2021-02-19 17:36:38,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 89386 transitions. [2021-02-19 17:36:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:38,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:38,973 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:39,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:39,174 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1958174096, now seen corresponding path program 34 times [2021-02-19 17:36:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511738811] [2021-02-19 17:36:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:39,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511738811] [2021-02-19 17:36:39,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929174110] [2021-02-19 17:36:39,201 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 [2021-02-19 17:36:39,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:39,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:39,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:36:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715539082] [2021-02-19 17:36:39,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:39,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:39,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:39,290 INFO L87 Difference]: Start difference. First operand 21017 states and 89386 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-02-19 17:36:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:40,270 INFO L93 Difference]: Finished difference Result 38364 states and 158236 transitions. [2021-02-19 17:36:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:36:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 29 [2021-02-19 17:36:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:40,369 INFO L225 Difference]: With dead ends: 38364 [2021-02-19 17:36:40,369 INFO L226 Difference]: Without dead ends: 38344 [2021-02-19 17:36:40,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:36:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38344 states. [2021-02-19 17:36:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38344 to 21400. [2021-02-19 17:36:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21400 states, 21399 states have (on average 4.237441001915977) internal successors, (90677), 21399 states have internal predecessors, (90677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21400 states to 21400 states and 90677 transitions. [2021-02-19 17:36:40,857 INFO L78 Accepts]: Start accepts. Automaton has 21400 states and 90677 transitions. Word has length 29 [2021-02-19 17:36:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:40,857 INFO L480 AbstractCegarLoop]: Abstraction has 21400 states and 90677 transitions. [2021-02-19 17:36:40,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-02-19 17:36:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 21400 states and 90677 transitions. [2021-02-19 17:36:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:40,892 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:40,892 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:41,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:41,095 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash 347305102, now seen corresponding path program 35 times [2021-02-19 17:36:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801783074] [2021-02-19 17:36:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:41,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801783074] [2021-02-19 17:36:41,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689385266] [2021-02-19 17:36:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:41,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:36:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:41,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:41,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:36:41,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249703151] [2021-02-19 17:36:41,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:41,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:41,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:41,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:41,236 INFO L87 Difference]: Start difference. First operand 21400 states and 90677 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-02-19 17:36:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:41,760 INFO L93 Difference]: Finished difference Result 37284 states and 146566 transitions. [2021-02-19 17:36:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:36:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 29 [2021-02-19 17:36:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:41,851 INFO L225 Difference]: With dead ends: 37284 [2021-02-19 17:36:41,851 INFO L226 Difference]: Without dead ends: 37184 [2021-02-19 17:36:41,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:36:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37184 states. [2021-02-19 17:36:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37184 to 21702. [2021-02-19 17:36:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21702 states, 21701 states have (on average 4.22432145984056) internal successors, (91672), 21701 states have internal predecessors, (91672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 91672 transitions. [2021-02-19 17:36:42,440 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 91672 transitions. Word has length 29 [2021-02-19 17:36:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:42,440 INFO L480 AbstractCegarLoop]: Abstraction has 21702 states and 91672 transitions. [2021-02-19 17:36:42,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-02-19 17:36:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 91672 transitions. [2021-02-19 17:36:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:42,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:42,476 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:42,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 17:36:42,677 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 720767840, now seen corresponding path program 16 times [2021-02-19 17:36:42,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:42,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186599997] [2021-02-19 17:36:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:42,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186599997] [2021-02-19 17:36:42,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855743039] [2021-02-19 17:36:42,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:42,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:42,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:42,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:42,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:36:42,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076333408] [2021-02-19 17:36:42,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:42,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:42,793 INFO L87 Difference]: Start difference. First operand 21702 states and 91672 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:36:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:43,891 INFO L93 Difference]: Finished difference Result 62502 states and 262210 transitions. [2021-02-19 17:36:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:36:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 29 [2021-02-19 17:36:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:44,067 INFO L225 Difference]: With dead ends: 62502 [2021-02-19 17:36:44,067 INFO L226 Difference]: Without dead ends: 62502 [2021-02-19 17:36:44,068 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:36:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62502 states. [2021-02-19 17:36:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62502 to 25980. [2021-02-19 17:36:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25980 states, 25979 states have (on average 4.299280187844028) internal successors, (111691), 25979 states have internal predecessors, (111691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 111691 transitions. [2021-02-19 17:36:44,774 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 111691 transitions. Word has length 29 [2021-02-19 17:36:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:44,774 INFO L480 AbstractCegarLoop]: Abstraction has 25980 states and 111691 transitions. [2021-02-19 17:36:44,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:36:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 111691 transitions. [2021-02-19 17:36:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:44,823 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:44,823 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:45,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:45,023 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash -706086176, now seen corresponding path program 17 times [2021-02-19 17:36:45,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:45,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027418098] [2021-02-19 17:36:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:45,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027418098] [2021-02-19 17:36:45,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533463944] [2021-02-19 17:36:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:45,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:36:45,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:45,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:45,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:36:45,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117817980] [2021-02-19 17:36:45,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:45,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:45,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:45,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:45,146 INFO L87 Difference]: Start difference. First operand 25980 states and 111691 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) [2021-02-19 17:36:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:45,748 INFO L93 Difference]: Finished difference Result 55112 states and 227311 transitions. [2021-02-19 17:36:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:36:45,749 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 29 [2021-02-19 17:36:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:45,902 INFO L225 Difference]: With dead ends: 55112 [2021-02-19 17:36:45,902 INFO L226 Difference]: Without dead ends: 54872 [2021-02-19 17:36:45,902 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:36:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54872 states. [2021-02-19 17:36:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54872 to 34226. [2021-02-19 17:36:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34226 states, 34225 states have (on average 4.397428780131483) internal successors, (150502), 34225 states have internal predecessors, (150502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34226 states to 34226 states and 150502 transitions. [2021-02-19 17:36:46,686 INFO L78 Accepts]: Start accepts. Automaton has 34226 states and 150502 transitions. Word has length 29 [2021-02-19 17:36:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:46,686 INFO L480 AbstractCegarLoop]: Abstraction has 34226 states and 150502 transitions. [2021-02-19 17:36:46,686 INFO L481 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) [2021-02-19 17:36:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 34226 states and 150502 transitions. [2021-02-19 17:36:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:46,750 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:46,750 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:46,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 17:36:46,954 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1994837280, now seen corresponding path program 18 times [2021-02-19 17:36:46,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:46,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776343565] [2021-02-19 17:36:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:46,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776343565] [2021-02-19 17:36:46,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641575004] [2021-02-19 17:36:46,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:47,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:36:47,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:47,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:47,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:47,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588565091] [2021-02-19 17:36:47,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:47,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:47,073 INFO L87 Difference]: Start difference. First operand 34226 states and 150502 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) [2021-02-19 17:36:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:47,580 INFO L93 Difference]: Finished difference Result 55218 states and 230451 transitions. [2021-02-19 17:36:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:36:47,580 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 29 [2021-02-19 17:36:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:47,739 INFO L225 Difference]: With dead ends: 55218 [2021-02-19 17:36:47,739 INFO L226 Difference]: Without dead ends: 55218 [2021-02-19 17:36:47,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:36:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55218 states. [2021-02-19 17:36:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55218 to 33975. [2021-02-19 17:36:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33975 states, 33974 states have (on average 4.384441043150645) internal successors, (148957), 33974 states have internal predecessors, (148957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33975 states to 33975 states and 148957 transitions. [2021-02-19 17:36:48,886 INFO L78 Accepts]: Start accepts. Automaton has 33975 states and 148957 transitions. Word has length 29 [2021-02-19 17:36:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:48,887 INFO L480 AbstractCegarLoop]: Abstraction has 33975 states and 148957 transitions. [2021-02-19 17:36:48,887 INFO L481 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) [2021-02-19 17:36:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 33975 states and 148957 transitions. [2021-02-19 17:36:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:48,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:48,959 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:49,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:49,162 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:49,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:49,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1005370600, now seen corresponding path program 19 times [2021-02-19 17:36:49,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:49,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180582202] [2021-02-19 17:36:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:49,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180582202] [2021-02-19 17:36:49,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885892582] [2021-02-19 17:36:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:49,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:49,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:49,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:49,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928415875] [2021-02-19 17:36:49,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:49,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:49,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:49,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:49,275 INFO L87 Difference]: Start difference. First operand 33975 states and 148957 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 17:36:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:49,725 INFO L93 Difference]: Finished difference Result 43486 states and 183757 transitions. [2021-02-19 17:36:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:36:49,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 29 [2021-02-19 17:36:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:49,840 INFO L225 Difference]: With dead ends: 43486 [2021-02-19 17:36:49,840 INFO L226 Difference]: Without dead ends: 43461 [2021-02-19 17:36:49,840 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:36:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43461 states. [2021-02-19 17:36:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43461 to 34031. [2021-02-19 17:36:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34031 states, 34030 states have (on average 4.383338230972671) internal successors, (149165), 34030 states have internal predecessors, (149165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34031 states to 34031 states and 149165 transitions. [2021-02-19 17:36:50,880 INFO L78 Accepts]: Start accepts. Automaton has 34031 states and 149165 transitions. Word has length 29 [2021-02-19 17:36:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:50,880 INFO L480 AbstractCegarLoop]: Abstraction has 34031 states and 149165 transitions. [2021-02-19 17:36:50,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 17:36:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34031 states and 149165 transitions. [2021-02-19 17:36:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:50,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:50,948 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:51,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:51,149 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 662133332, now seen corresponding path program 20 times [2021-02-19 17:36:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:51,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375687532] [2021-02-19 17:36:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375687532] [2021-02-19 17:36:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416590896] [2021-02-19 17:36:51,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:51,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:51,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:51,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:51,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:51,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369338053] [2021-02-19 17:36:51,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:51,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:51,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:51,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:51,411 INFO L87 Difference]: Start difference. First operand 34031 states and 149165 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-02-19 17:36:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:52,141 INFO L93 Difference]: Finished difference Result 91021 states and 382461 transitions. [2021-02-19 17:36:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:36:52,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 29 [2021-02-19 17:36:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:52,426 INFO L225 Difference]: With dead ends: 91021 [2021-02-19 17:36:52,426 INFO L226 Difference]: Without dead ends: 91021 [2021-02-19 17:36:52,427 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:36:52,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91021 states. [2021-02-19 17:36:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91021 to 37194. [2021-02-19 17:36:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.447261581480386) internal successors, (165407), 37193 states have internal predecessors, (165407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165407 transitions. [2021-02-19 17:36:53,896 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165407 transitions. Word has length 29 [2021-02-19 17:36:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:53,896 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165407 transitions. [2021-02-19 17:36:53,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-02-19 17:36:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165407 transitions. [2021-02-19 17:36:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:53,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:53,963 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:54,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:54,164 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 424169940, now seen corresponding path program 21 times [2021-02-19 17:36:54,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:54,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129629632] [2021-02-19 17:36:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129629632] [2021-02-19 17:36:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91366872] [2021-02-19 17:36:54,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:54,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:36:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:54,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:54,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:54,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:54,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:54,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374457782] [2021-02-19 17:36:54,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:54,443 INFO L87 Difference]: Start difference. First operand 37194 states and 165407 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-02-19 17:36:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:55,321 INFO L93 Difference]: Finished difference Result 65131 states and 273960 transitions. [2021-02-19 17:36:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:36:55,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 29 [2021-02-19 17:36:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:55,525 INFO L225 Difference]: With dead ends: 65131 [2021-02-19 17:36:55,525 INFO L226 Difference]: Without dead ends: 65083 [2021-02-19 17:36:55,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:36:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2021-02-19 17:36:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 37194. [2021-02-19 17:36:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.446938940123141) internal successors, (165395), 37193 states have internal predecessors, (165395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165395 transitions. [2021-02-19 17:36:56,572 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165395 transitions. Word has length 29 [2021-02-19 17:36:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:56,572 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165395 transitions. [2021-02-19 17:36:56,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-02-19 17:36:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165395 transitions. [2021-02-19 17:36:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:56,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:56,641 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:56,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:56,841 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:56,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1256326700, now seen corresponding path program 22 times [2021-02-19 17:36:56,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:56,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493802790] [2021-02-19 17:36:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493802790] [2021-02-19 17:36:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899657593] [2021-02-19 17:36:57,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:57,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:57,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:57,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:57,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199407749] [2021-02-19 17:36:57,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:57,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:57,166 INFO L87 Difference]: Start difference. First operand 37194 states and 165395 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-02-19 17:36:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:58,116 INFO L93 Difference]: Finished difference Result 80813 states and 340534 transitions. [2021-02-19 17:36:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:36:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 29 [2021-02-19 17:36:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:58,505 INFO L225 Difference]: With dead ends: 80813 [2021-02-19 17:36:58,505 INFO L226 Difference]: Without dead ends: 80813 [2021-02-19 17:36:58,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:36:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80813 states. [2021-02-19 17:36:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80813 to 37432. [2021-02-19 17:36:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445646656514653) internal successors, (166405), 37431 states have internal predecessors, (166405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166405 transitions. [2021-02-19 17:36:59,710 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166405 transitions. Word has length 29 [2021-02-19 17:36:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:59,710 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166405 transitions. [2021-02-19 17:36:59,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-02-19 17:36:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166405 transitions. [2021-02-19 17:36:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:59,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:59,783 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:59,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 17:36:59,983 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash -266860020, now seen corresponding path program 23 times [2021-02-19 17:36:59,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:59,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449261781] [2021-02-19 17:36:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449261781] [2021-02-19 17:37:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123535364] [2021-02-19 17:37:00,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:00,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:37:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:00,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:00,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:37:00,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270164374] [2021-02-19 17:37:00,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:00,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:00,108 INFO L87 Difference]: Start difference. First operand 37432 states and 166405 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) [2021-02-19 17:37:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:00,920 INFO L93 Difference]: Finished difference Result 70173 states and 294528 transitions. [2021-02-19 17:37:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:37:00,921 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 29 [2021-02-19 17:37:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:01,144 INFO L225 Difference]: With dead ends: 70173 [2021-02-19 17:37:01,144 INFO L226 Difference]: Without dead ends: 70123 [2021-02-19 17:37:01,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:37:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-02-19 17:37:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 37432. [2021-02-19 17:37:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445326066629264) internal successors, (166393), 37431 states have internal predecessors, (166393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166393 transitions. [2021-02-19 17:37:02,305 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166393 transitions. Word has length 29 [2021-02-19 17:37:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:02,305 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166393 transitions. [2021-02-19 17:37:02,305 INFO L481 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) [2021-02-19 17:37:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166393 transitions. [2021-02-19 17:37:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:02,375 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:02,375 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:02,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:02,576 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:02,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2130581360, now seen corresponding path program 24 times [2021-02-19 17:37:02,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:02,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434318272] [2021-02-19 17:37:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:02,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434318272] [2021-02-19 17:37:02,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581514545] [2021-02-19 17:37:02,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:02,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:37:02,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:02,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:02,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:02,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:37:02,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975228554] [2021-02-19 17:37:02,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:37:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:37:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:37:02,691 INFO L87 Difference]: Start difference. First operand 37432 states and 166393 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-02-19 17:37:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:03,861 INFO L93 Difference]: Finished difference Result 71774 states and 303967 transitions. [2021-02-19 17:37:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:37:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 29 [2021-02-19 17:37:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:04,093 INFO L225 Difference]: With dead ends: 71774 [2021-02-19 17:37:04,093 INFO L226 Difference]: Without dead ends: 71774 [2021-02-19 17:37:04,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:37:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71774 states. [2021-02-19 17:37:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71774 to 35977. [2021-02-19 17:37:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35977 states, 35976 states have (on average 4.413970424727596) internal successors, (158797), 35976 states have internal predecessors, (158797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35977 states to 35977 states and 158797 transitions. [2021-02-19 17:37:05,316 INFO L78 Accepts]: Start accepts. Automaton has 35977 states and 158797 transitions. Word has length 29 [2021-02-19 17:37:05,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:05,316 INFO L480 AbstractCegarLoop]: Abstraction has 35977 states and 158797 transitions. [2021-02-19 17:37:05,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-02-19 17:37:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 35977 states and 158797 transitions. [2021-02-19 17:37:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:05,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:05,385 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:05,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:05,585 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1264317122, now seen corresponding path program 25 times [2021-02-19 17:37:05,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:05,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242271134] [2021-02-19 17:37:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242271134] [2021-02-19 17:37:05,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864483215] [2021-02-19 17:37:05,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:37:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:05,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:05,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:05,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:37:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091683957] [2021-02-19 17:37:05,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:37:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:37:05,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:37:05,705 INFO L87 Difference]: Start difference. First operand 35977 states and 158797 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-02-19 17:37:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:06,489 INFO L93 Difference]: Finished difference Result 58206 states and 243463 transitions. [2021-02-19 17:37:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:37:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 29 [2021-02-19 17:37:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:06,667 INFO L225 Difference]: With dead ends: 58206 [2021-02-19 17:37:06,668 INFO L226 Difference]: Without dead ends: 58131 [2021-02-19 17:37:06,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:37:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58131 states. [2021-02-19 17:37:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58131 to 36089. [2021-02-19 17:37:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36089 states, 36088 states have (on average 4.4117989359343825) internal successors, (159213), 36088 states have internal predecessors, (159213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36089 states to 36089 states and 159213 transitions. [2021-02-19 17:37:07,820 INFO L78 Accepts]: Start accepts. Automaton has 36089 states and 159213 transitions. Word has length 29 [2021-02-19 17:37:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:07,820 INFO L480 AbstractCegarLoop]: Abstraction has 36089 states and 159213 transitions. [2021-02-19 17:37:07,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-02-19 17:37:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 36089 states and 159213 transitions. [2021-02-19 17:37:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:07,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:07,894 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:08,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-02-19 17:37:08,098 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1584549016, now seen corresponding path program 26 times [2021-02-19 17:37:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:08,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172770303] [2021-02-19 17:37:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:08,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172770303] [2021-02-19 17:37:08,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992269312] [2021-02-19 17:37:08,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:08,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:37:08,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:08,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:08,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:37:08,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000214711] [2021-02-19 17:37:08,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:37:08,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:08,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:37:08,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:37:08,479 INFO L87 Difference]: Start difference. First operand 36089 states and 159213 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) [2021-02-19 17:37:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:09,374 INFO L93 Difference]: Finished difference Result 73446 states and 309536 transitions. [2021-02-19 17:37:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:37:09,375 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 29 [2021-02-19 17:37:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:09,847 INFO L225 Difference]: With dead ends: 73446 [2021-02-19 17:37:09,847 INFO L226 Difference]: Without dead ends: 73446 [2021-02-19 17:37:09,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:37:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73446 states. [2021-02-19 17:37:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73446 to 35349. [2021-02-19 17:37:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35349 states, 35348 states have (on average 4.388536833767115) internal successors, (155126), 35348 states have internal predecessors, (155126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35349 states to 35349 states and 155126 transitions. [2021-02-19 17:37:10,894 INFO L78 Accepts]: Start accepts. Automaton has 35349 states and 155126 transitions. Word has length 29 [2021-02-19 17:37:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:10,894 INFO L480 AbstractCegarLoop]: Abstraction has 35349 states and 155126 transitions. [2021-02-19 17:37:10,894 INFO L481 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) [2021-02-19 17:37:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35349 states and 155126 transitions. [2021-02-19 17:37:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:10,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:10,961 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:11,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:11,166 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash 534995992, now seen corresponding path program 27 times [2021-02-19 17:37:11,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:11,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958003735] [2021-02-19 17:37:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:11,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958003735] [2021-02-19 17:37:11,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805174236] [2021-02-19 17:37:11,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:37:11,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:37:11,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:11,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:11,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:11,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:37:11,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082620312] [2021-02-19 17:37:11,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:37:11,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:37:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:37:11,288 INFO L87 Difference]: Start difference. First operand 35349 states and 155126 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-02-19 17:37:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:12,144 INFO L93 Difference]: Finished difference Result 54059 states and 225007 transitions. [2021-02-19 17:37:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:37:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 29 [2021-02-19 17:37:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:12,323 INFO L225 Difference]: With dead ends: 54059 [2021-02-19 17:37:12,323 INFO L226 Difference]: Without dead ends: 53987 [2021-02-19 17:37:12,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:37:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53987 states. [2021-02-19 17:37:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53987 to 33989. [2021-02-19 17:37:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.398140520183595) internal successors, (149484), 33988 states have internal predecessors, (149484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149484 transitions. [2021-02-19 17:37:13,411 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149484 transitions. Word has length 29 [2021-02-19 17:37:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:13,411 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149484 transitions. [2021-02-19 17:37:13,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-02-19 17:37:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149484 transitions. [2021-02-19 17:37:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:13,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:13,475 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:13,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 17:37:13,675 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash -981310124, now seen corresponding path program 28 times [2021-02-19 17:37:13,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:13,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818695614] [2021-02-19 17:37:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:13,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818695614] [2021-02-19 17:37:13,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117591290] [2021-02-19 17:37:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:13,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:37:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:13,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:13,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:13,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:37:13,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735752740] [2021-02-19 17:37:13,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:37:13,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:13,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:37:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:13,785 INFO L87 Difference]: Start difference. First operand 33989 states and 149484 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) [2021-02-19 17:37:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:14,294 INFO L93 Difference]: Finished difference Result 63659 states and 263324 transitions. [2021-02-19 17:37:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:37:14,295 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 29 [2021-02-19 17:37:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:14,476 INFO L225 Difference]: With dead ends: 63659 [2021-02-19 17:37:14,476 INFO L226 Difference]: Without dead ends: 63659 [2021-02-19 17:37:14,476 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:37:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63659 states. [2021-02-19 17:37:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63659 to 33989. [2021-02-19 17:37:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.391138048723079) internal successors, (149246), 33988 states have internal predecessors, (149246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149246 transitions. [2021-02-19 17:37:15,760 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149246 transitions. Word has length 29 [2021-02-19 17:37:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:15,760 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149246 transitions. [2021-02-19 17:37:15,760 INFO L481 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) [2021-02-19 17:37:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149246 transitions. [2021-02-19 17:37:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:15,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:15,826 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:16,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 17:37:16,027 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1219273516, now seen corresponding path program 29 times [2021-02-19 17:37:16,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:16,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003251134] [2021-02-19 17:37:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:16,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003251134] [2021-02-19 17:37:16,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472689701] [2021-02-19 17:37:16,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:16,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:37:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:16,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:16,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:16,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:37:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165321244] [2021-02-19 17:37:16,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:37:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:37:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:16,144 INFO L87 Difference]: Start difference. First operand 33989 states and 149246 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) [2021-02-19 17:37:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:16,648 INFO L93 Difference]: Finished difference Result 49482 states and 206551 transitions. [2021-02-19 17:37:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:37:16,649 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 29 [2021-02-19 17:37:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:16,792 INFO L225 Difference]: With dead ends: 49482 [2021-02-19 17:37:16,793 INFO L226 Difference]: Without dead ends: 49458 [2021-02-19 17:37:16,793 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:37:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49458 states. [2021-02-19 17:37:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49458 to 33537. [2021-02-19 17:37:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33537 states, 33536 states have (on average 4.385376908396947) internal successors, (147068), 33536 states have internal predecessors, (147068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33537 states to 33537 states and 147068 transitions. [2021-02-19 17:37:17,791 INFO L78 Accepts]: Start accepts. Automaton has 33537 states and 147068 transitions. Word has length 29 [2021-02-19 17:37:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:17,791 INFO L480 AbstractCegarLoop]: Abstraction has 33537 states and 147068 transitions. [2021-02-19 17:37:17,791 INFO L481 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) [2021-02-19 17:37:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 33537 states and 147068 transitions. [2021-02-19 17:37:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:17,857 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:17,857 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:18,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:18,062 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1395197140, now seen corresponding path program 30 times [2021-02-19 17:37:18,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:18,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294418213] [2021-02-19 17:37:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:18,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294418213] [2021-02-19 17:37:18,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834499704] [2021-02-19 17:37:18,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:18,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:37:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:18,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:18,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:37:18,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687640320] [2021-02-19 17:37:18,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:37:18,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:37:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:18,169 INFO L87 Difference]: Start difference. First operand 33537 states and 147068 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) [2021-02-19 17:37:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:19,033 INFO L93 Difference]: Finished difference Result 58652 states and 245549 transitions. [2021-02-19 17:37:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:37:19,034 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 29 [2021-02-19 17:37:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:19,202 INFO L225 Difference]: With dead ends: 58652 [2021-02-19 17:37:19,202 INFO L226 Difference]: Without dead ends: 58652 [2021-02-19 17:37:19,202 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:37:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58652 states. [2021-02-19 17:37:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58652 to 33775. [2021-02-19 17:37:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.384378516018239) internal successors, (148078), 33774 states have internal predecessors, (148078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148078 transitions. [2021-02-19 17:37:20,169 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148078 transitions. Word has length 29 [2021-02-19 17:37:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:20,169 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148078 transitions. [2021-02-19 17:37:20,169 INFO L481 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) [2021-02-19 17:37:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148078 transitions. [2021-02-19 17:37:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:20,233 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:20,233 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:20,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:20,433 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1910303476, now seen corresponding path program 31 times [2021-02-19 17:37:20,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:20,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512691943] [2021-02-19 17:37:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:20,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512691943] [2021-02-19 17:37:20,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981086923] [2021-02-19 17:37:20,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:20,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:20,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:20,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:37:20,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173231851] [2021-02-19 17:37:20,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:37:20,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:37:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:20,530 INFO L87 Difference]: Start difference. First operand 33775 states and 148078 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 17:37:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:21,291 INFO L93 Difference]: Finished difference Result 57310 states and 235132 transitions. [2021-02-19 17:37:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:37:21,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 29 [2021-02-19 17:37:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:21,477 INFO L225 Difference]: With dead ends: 57310 [2021-02-19 17:37:21,477 INFO L226 Difference]: Without dead ends: 57285 [2021-02-19 17:37:21,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:37:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57285 states. [2021-02-19 17:37:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57285 to 33775. [2021-02-19 17:37:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.3840232131225205) internal successors, (148066), 33774 states have internal predecessors, (148066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148066 transitions. [2021-02-19 17:37:22,512 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148066 transitions. Word has length 29 [2021-02-19 17:37:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:22,513 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148066 transitions. [2021-02-19 17:37:22,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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) [2021-02-19 17:37:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148066 transitions. [2021-02-19 17:37:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:22,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:22,577 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:22,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:22,777 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:22,778 INFO L82 PathProgramCache]: Analyzing trace with hash 520942480, now seen corresponding path program 32 times [2021-02-19 17:37:22,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:22,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238562090] [2021-02-19 17:37:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:22,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238562090] [2021-02-19 17:37:22,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393141769] [2021-02-19 17:37:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:22,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:37:22,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:22,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:22,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:22,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:37:22,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818423962] [2021-02-19 17:37:22,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:22,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:22,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:22,895 INFO L87 Difference]: Start difference. First operand 33775 states and 148066 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:37:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:24,431 INFO L93 Difference]: Finished difference Result 79431 states and 334909 transitions. [2021-02-19 17:37:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 17:37:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 29 [2021-02-19 17:37:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:24,680 INFO L225 Difference]: With dead ends: 79431 [2021-02-19 17:37:24,680 INFO L226 Difference]: Without dead ends: 79431 [2021-02-19 17:37:24,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 17:37:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79431 states. [2021-02-19 17:37:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79431 to 34251. [2021-02-19 17:37:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34251 states, 34250 states have (on average 4.38207299270073) internal successors, (150086), 34250 states have internal predecessors, (150086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34251 states to 34251 states and 150086 transitions. [2021-02-19 17:37:25,777 INFO L78 Accepts]: Start accepts. Automaton has 34251 states and 150086 transitions. Word has length 29 [2021-02-19 17:37:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:25,777 INFO L480 AbstractCegarLoop]: Abstraction has 34251 states and 150086 transitions. [2021-02-19 17:37:25,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:37:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 34251 states and 150086 transitions. [2021-02-19 17:37:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:25,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:25,839 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:26,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:26,040 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:26,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1387206718, now seen corresponding path program 33 times [2021-02-19 17:37:26,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:26,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131972345] [2021-02-19 17:37:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:37:26,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131972345] [2021-02-19 17:37:26,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986755175] [2021-02-19 17:37:26,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:37:26,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:37:26,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:26,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:26,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:26,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:37:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905434404] [2021-02-19 17:37:26,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:26,155 INFO L87 Difference]: Start difference. First operand 34251 states and 150086 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-02-19 17:37:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:27,186 INFO L93 Difference]: Finished difference Result 73063 states and 296904 transitions. [2021-02-19 17:37:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:37:27,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 29 [2021-02-19 17:37:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:27,409 INFO L225 Difference]: With dead ends: 73063 [2021-02-19 17:37:27,409 INFO L226 Difference]: Without dead ends: 72813 [2021-02-19 17:37:27,409 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:37:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72813 states. [2021-02-19 17:37:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72813 to 34704. [2021-02-19 17:37:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34704 states, 34703 states have (on average 4.386681266749273) internal successors, (152231), 34703 states have internal predecessors, (152231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34704 states to 34704 states and 152231 transitions. [2021-02-19 17:37:28,545 INFO L78 Accepts]: Start accepts. Automaton has 34704 states and 152231 transitions. Word has length 29 [2021-02-19 17:37:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:28,545 INFO L480 AbstractCegarLoop]: Abstraction has 34704 states and 152231 transitions. [2021-02-19 17:37:28,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-02-19 17:37:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 34704 states and 152231 transitions. [2021-02-19 17:37:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:28,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:28,612 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:28,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:28,812 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:28,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash -425569136, now seen corresponding path program 34 times [2021-02-19 17:37:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:28,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192175958] [2021-02-19 17:37:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192175958] [2021-02-19 17:37:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878207138] [2021-02-19 17:37:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:28,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:37:28,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:28,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:28,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:28,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:37:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533082052] [2021-02-19 17:37:28,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:28,940 INFO L87 Difference]: Start difference. First operand 34704 states and 152231 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) [2021-02-19 17:37:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:30,159 INFO L93 Difference]: Finished difference Result 60164 states and 255426 transitions. [2021-02-19 17:37:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:37:30,160 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 29 [2021-02-19 17:37:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:30,630 INFO L225 Difference]: With dead ends: 60164 [2021-02-19 17:37:30,630 INFO L226 Difference]: Without dead ends: 60139 [2021-02-19 17:37:30,630 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:37:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60139 states. [2021-02-19 17:37:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60139 to 34900. [2021-02-19 17:37:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34900 states, 34899 states have (on average 4.346571535001003) internal successors, (151691), 34899 states have internal predecessors, (151691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34900 states to 34900 states and 151691 transitions. [2021-02-19 17:37:31,766 INFO L78 Accepts]: Start accepts. Automaton has 34900 states and 151691 transitions. Word has length 29 [2021-02-19 17:37:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:31,766 INFO L480 AbstractCegarLoop]: Abstraction has 34900 states and 151691 transitions. [2021-02-19 17:37:31,766 INFO L481 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) [2021-02-19 17:37:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 34900 states and 151691 transitions. [2021-02-19 17:37:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:31,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:31,840 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:32,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-02-19 17:37:32,040 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:32,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1938936006, now seen corresponding path program 35 times [2021-02-19 17:37:32,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:32,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198704764] [2021-02-19 17:37:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:32,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198704764] [2021-02-19 17:37:32,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885986886] [2021-02-19 17:37:32,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:32,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:37:32,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:32,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:32,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:37:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405547316] [2021-02-19 17:37:32,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:32,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:32,153 INFO L87 Difference]: Start difference. First operand 34900 states and 151691 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) [2021-02-19 17:37:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:32,815 INFO L93 Difference]: Finished difference Result 58744 states and 238407 transitions. [2021-02-19 17:37:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:37:32,815 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 29 [2021-02-19 17:37:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:32,994 INFO L225 Difference]: With dead ends: 58744 [2021-02-19 17:37:32,994 INFO L226 Difference]: Without dead ends: 58603 [2021-02-19 17:37:32,994 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:37:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-02-19 17:37:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 35796. [2021-02-19 17:37:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 4.330828327978768) internal successors, (155022), 35795 states have internal predecessors, (155022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 155022 transitions. [2021-02-19 17:37:34,051 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 155022 transitions. Word has length 29 [2021-02-19 17:37:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:34,051 INFO L480 AbstractCegarLoop]: Abstraction has 35796 states and 155022 transitions. [2021-02-19 17:37:34,052 INFO L481 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) [2021-02-19 17:37:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 155022 transitions. [2021-02-19 17:37:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:37:34,116 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:34,116 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:34,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:34,316 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:34,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2075955494, now seen corresponding path program 36 times [2021-02-19 17:37:34,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:34,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469583616] [2021-02-19 17:37:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469583616] [2021-02-19 17:37:34,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064271181] [2021-02-19 17:37:34,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:34,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:37:34,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:34,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:37:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:34,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:34,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-02-19 17:37:34,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500718350] [2021-02-19 17:37:34,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:37:34,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:37:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:34,488 INFO L87 Difference]: Start difference. First operand 35796 states and 155022 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:35,091 INFO L93 Difference]: Finished difference Result 38312 states and 164159 transitions. [2021-02-19 17:37:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:37:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 17:37:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:35,201 INFO L225 Difference]: With dead ends: 38312 [2021-02-19 17:37:35,201 INFO L226 Difference]: Without dead ends: 38244 [2021-02-19 17:37:35,201 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38244 states. [2021-02-19 17:37:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38244 to 36866. [2021-02-19 17:37:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36866 states, 36865 states have (on average 4.320493693204937) internal successors, (159275), 36865 states have internal predecessors, (159275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36866 states to 36866 states and 159275 transitions. [2021-02-19 17:37:36,183 INFO L78 Accepts]: Start accepts. Automaton has 36866 states and 159275 transitions. Word has length 31 [2021-02-19 17:37:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:36,183 INFO L480 AbstractCegarLoop]: Abstraction has 36866 states and 159275 transitions. [2021-02-19 17:37:36,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36866 states and 159275 transitions. [2021-02-19 17:37:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:37:36,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:36,252 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:36,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:36,452 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash 948308914, now seen corresponding path program 37 times [2021-02-19 17:37:36,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:36,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264625336] [2021-02-19 17:37:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:37:36,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264625336] [2021-02-19 17:37:36,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571248106] [2021-02-19 17:37:36,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:37:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-02-19 17:45:16,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 17:45:16,531 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:45:16,533 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:45:16,534 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:45:16 BasicIcfg [2021-02-19 17:45:16,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:45:16,534 INFO L168 Benchmark]: Toolchain (without parser) took 575383.10 ms. Allocated memory was 255.9 MB in the beginning and 14.7 GB in the end (delta: 14.4 GB). Free memory was 236.9 MB in the beginning and 7.5 GB in the end (delta: -7.3 GB). Peak memory consumption was 15.4 GB. Max. memory is 16.0 GB. [2021-02-19 17:45:16,534 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:45:16,534 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.54 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:45:16,534 INFO L168 Benchmark]: Boogie Preprocessor took 13.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 233.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:45:16,534 INFO L168 Benchmark]: RCFGBuilder took 186.55 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 241.1 MB in the end (delta: -7.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. [2021-02-19 17:45:16,534 INFO L168 Benchmark]: TraceAbstraction took 575155.29 ms. Allocated memory was 255.9 MB in the beginning and 14.7 GB in the end (delta: 14.4 GB). Free memory was 240.4 MB in the beginning and 7.5 GB in the end (delta: -7.3 GB). Peak memory consumption was 15.4 GB. Max. memory is 16.0 GB. [2021-02-19 17:45:16,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.54 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.55 ms. Allocated memory is still 255.9 MB. Free memory was 234.9 MB in the beginning and 233.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 186.55 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 241.1 MB in the end (delta: -7.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 575155.29 ms. Allocated memory was 255.9 MB in the beginning and 14.7 GB in the end (delta: 14.4 GB). Free memory was 240.4 MB in the beginning and 7.5 GB in the end (delta: -7.3 GB). Peak memory consumption was 15.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 382 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 575.0s, OverallIterations: 89, TraceHistogramMax: 3, AutomataDifference: 44.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6974 SDtfs, 19980 SDslu, 28395 SDs, 0 SdLazy, 29354 SolverSat, 1133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3549 GetRequests, 1875 SyntacticMatches, 162 SemanticMatches, 1512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8782 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37432occurred in iteration=74, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 39.8s AutomataMinimizationTime, 88 MinimizatonAttempts, 1021748 StatesRemovedByMinimization, 88 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 4511 NumberOfCodeBlocks, 4511 NumberOfCodeBlocksAsserted, 283 NumberOfCheckSat, 4344 ConstructedInterpolants, 0 QuantifiedInterpolants, 733894 SizeOfPredicates, 250 NumberOfNonLiveVariables, 5566 ConjunctsInSsa, 603 ConjunctsInUnsatCore, 167 InterpolantComputations, 9 PerfectInterpolantSequences, 479/1461 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown