/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:17,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:17,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:17,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:14:17,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:14:17,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:14:17,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:14:17,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:14:17,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:14:17,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:14:17,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:14:17,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:14:17,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:17,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:17,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:17,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:17,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:17,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:17,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:17,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:17,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:17,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:17,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:17,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:17,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:17,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:17,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:17,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:17,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:14:17,639 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:17,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:17,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:17,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:17,641 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:17,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:17,641 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:17,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:17,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:17,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:17,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:17,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:17,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:17,643 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:17,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:17,643 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:17,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:17,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:17,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:17,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:17,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:17,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:17,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:17,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:17,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:17,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:17,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:17,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:17,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:17,935 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:17,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:17,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:17,953 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:17,954 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:17,954 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label42.c [2019-11-06 19:14:18,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c80ec6ae/1001e4f42d7d42babe4507d6ad8472ea/FLAG0338b01b2 [2019-11-06 19:14:18,612 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:18,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label42.c [2019-11-06 19:14:18,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c80ec6ae/1001e4f42d7d42babe4507d6ad8472ea/FLAG0338b01b2 [2019-11-06 19:14:18,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c80ec6ae/1001e4f42d7d42babe4507d6ad8472ea [2019-11-06 19:14:18,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:18,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:18,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:18,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:18,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:18,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:18" (1/1) ... [2019-11-06 19:14:18,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d7f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:18, skipping insertion in model container [2019-11-06 19:14:18,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:18" (1/1) ... [2019-11-06 19:14:18,899 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:18,976 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:19,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:19,611 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:19,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:19,792 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:19,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19 WrapperNode [2019-11-06 19:14:19,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:19,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:19,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:19,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:19,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (1/1) ... [2019-11-06 19:14:19,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:19,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:19,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:19,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:19,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (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 [2019-11-06 19:14:19,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:19,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:19,997 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:19,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:21,446 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:21,447 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:21,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:21 BoogieIcfgContainer [2019-11-06 19:14:21,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:21,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:21,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:21,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:21,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:18" (1/3) ... [2019-11-06 19:14:21,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cf5efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:21, skipping insertion in model container [2019-11-06 19:14:21,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:19" (2/3) ... [2019-11-06 19:14:21,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cf5efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:21, skipping insertion in model container [2019-11-06 19:14:21,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:21" (3/3) ... [2019-11-06 19:14:21,457 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label42.c [2019-11-06 19:14:21,467 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:21,476 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:21,488 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:21,528 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:21,529 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:21,530 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:21,530 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:21,531 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:21,531 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:21,531 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:21,531 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 19:14:21,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:21,577 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:21,578 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1174892051, now seen corresponding path program 1 times [2019-11-06 19:14:21,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:21,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042778166] [2019-11-06 19:14:21,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:22,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042778166] [2019-11-06 19:14:22,016 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:22,016 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:22,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400882959] [2019-11-06 19:14:22,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:22,026 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:22,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:22,047 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:24,665 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:14:24,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:24,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-11-06 19:14:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:24,690 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:14:24,690 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:24,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:14:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:14:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:14:24,824 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 48 [2019-11-06 19:14:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:24,825 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:14:24,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:14:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:14:24,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:24,841 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:24,842 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash -56716970, now seen corresponding path program 1 times [2019-11-06 19:14:24,843 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:24,843 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152301755] [2019-11-06 19:14:24,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:25,222 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152301755] [2019-11-06 19:14:25,222 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:25,222 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:14:25,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723483206] [2019-11-06 19:14:25,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:25,225 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:25,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:25,226 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:14:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:27,208 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:14:27,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:14:27,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 134 [2019-11-06 19:14:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:27,225 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:14:27,225 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:14:27,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:27,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:14:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:14:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:14:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:14:27,275 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 134 [2019-11-06 19:14:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:27,278 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:14:27,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:14:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 19:14:27,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:27,285 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:27,285 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash -867586423, now seen corresponding path program 1 times [2019-11-06 19:14:27,286 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:27,286 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382732419] [2019-11-06 19:14:27,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:27,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382732419] [2019-11-06 19:14:27,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15121047] [2019-11-06 19:14:27,604 INFO L94 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 [2019-11-06 19:14:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:27,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:27,853 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:27,853 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:27,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311197255] [2019-11-06 19:14:27,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:27,861 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:27,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:27,862 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-11-06 19:14:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:28,815 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-11-06 19:14:28,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:28,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2019-11-06 19:14:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:28,825 INFO L225 Difference]: With dead ends: 1680 [2019-11-06 19:14:28,825 INFO L226 Difference]: Without dead ends: 1120 [2019-11-06 19:14:28,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-11-06 19:14:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-11-06 19:14:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-11-06 19:14:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-11-06 19:14:28,859 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 143 [2019-11-06 19:14:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:28,860 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-11-06 19:14:28,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-11-06 19:14:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-11-06 19:14:28,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:28,865 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:29,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:29,070 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:29,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1724923771, now seen corresponding path program 1 times [2019-11-06 19:14:29,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:29,072 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814429893] [2019-11-06 19:14:29,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:29,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814429893] [2019-11-06 19:14:29,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044932380] [2019-11-06 19:14:29,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:30,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:30,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:14:30,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:30,120 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-11-06 19:14:30,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560061559] [2019-11-06 19:14:30,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:30,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:30,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:14:30,123 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-11-06 19:14:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:30,971 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-11-06 19:14:30,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:30,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2019-11-06 19:14:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:30,981 INFO L225 Difference]: With dead ends: 2414 [2019-11-06 19:14:30,981 INFO L226 Difference]: Without dead ends: 1486 [2019-11-06 19:14:30,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 250 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:14:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-11-06 19:14:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-11-06 19:14:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-11-06 19:14:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-11-06 19:14:31,023 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 246 [2019-11-06 19:14:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:31,024 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-11-06 19:14:31,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-11-06 19:14:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-11-06 19:14:31,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:31,030 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:31,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:31,242 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:31,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1559737594, now seen corresponding path program 1 times [2019-11-06 19:14:31,243 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:31,243 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274891445] [2019-11-06 19:14:31,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 19:14:31,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274891445] [2019-11-06 19:14:31,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141963851] [2019-11-06 19:14:31,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:31,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:31,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:14:31,815 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:31,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-06 19:14:31,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903037663] [2019-11-06 19:14:31,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:31,817 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:31,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:31,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:14:31,819 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-11-06 19:14:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:32,653 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-11-06 19:14:32,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:32,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2019-11-06 19:14:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:32,665 INFO L225 Difference]: With dead ends: 3156 [2019-11-06 19:14:32,665 INFO L226 Difference]: Without dead ends: 1858 [2019-11-06 19:14:32,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:14:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-11-06 19:14:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-11-06 19:14:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-11-06 19:14:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-11-06 19:14:32,723 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 265 [2019-11-06 19:14:32,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:32,724 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-11-06 19:14:32,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-11-06 19:14:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 19:14:32,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:32,731 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:32,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:32,943 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash -81866982, now seen corresponding path program 1 times [2019-11-06 19:14:32,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:32,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254945481] [2019-11-06 19:14:32,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 151 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:33,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254945481] [2019-11-06 19:14:33,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291512701] [2019-11-06 19:14:33,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:33,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:14:33,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:33,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 19:14:33,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:33,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-11-06 19:14:33,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587060198] [2019-11-06 19:14:33,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:33,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:33,558 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-11-06 19:14:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:35,038 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-11-06 19:14:35,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:35,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 271 [2019-11-06 19:14:35,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:35,051 INFO L225 Difference]: With dead ends: 3930 [2019-11-06 19:14:35,051 INFO L226 Difference]: Without dead ends: 2262 [2019-11-06 19:14:35,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:14:35,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-11-06 19:14:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-11-06 19:14:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-11-06 19:14:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-11-06 19:14:35,135 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 271 [2019-11-06 19:14:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:35,136 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-11-06 19:14:35,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-11-06 19:14:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2019-11-06 19:14:35,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:35,148 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:35,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:35,361 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1471725011, now seen corresponding path program 1 times [2019-11-06 19:14:35,362 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:35,362 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564139473] [2019-11-06 19:14:35,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 133 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:14:36,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564139473] [2019-11-06 19:14:36,655 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831943024] [2019-11-06 19:14:36,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:14:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:36,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:14:36,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:36,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 307 proven. 53 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 19:14:37,031 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:37,032 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:14:37,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212864544] [2019-11-06 19:14:37,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:14:37,033 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:37,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:14:37,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:37,034 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-11-06 19:14:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:41,011 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-11-06 19:14:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:14:41,013 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 355 [2019-11-06 19:14:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:41,023 INFO L225 Difference]: With dead ends: 4460 [2019-11-06 19:14:41,023 INFO L226 Difference]: Without dead ends: 2349 [2019-11-06 19:14:41,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:14:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-11-06 19:14:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-11-06 19:14:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-11-06 19:14:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-11-06 19:14:41,089 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 355 [2019-11-06 19:14:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:41,090 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-11-06 19:14:41,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:14:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-11-06 19:14:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-11-06 19:14:41,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:41,100 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:41,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:41,309 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:41,310 INFO L82 PathProgramCache]: Analyzing trace with hash 859589664, now seen corresponding path program 1 times [2019-11-06 19:14:41,310 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:41,310 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976260222] [2019-11-06 19:14:41,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 189 proven. 158 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 19:14:42,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976260222] [2019-11-06 19:14:42,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013550461] [2019-11-06 19:14:42,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:42,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:42,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:14:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 19:14:42,330 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:42,330 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-11-06 19:14:42,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800019183] [2019-11-06 19:14:42,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:42,331 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:42,332 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-11-06 19:14:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:43,471 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-11-06 19:14:43,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:14:43,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 380 [2019-11-06 19:14:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:43,486 INFO L225 Difference]: With dead ends: 5098 [2019-11-06 19:14:43,487 INFO L226 Difference]: Without dead ends: 2836 [2019-11-06 19:14:43,492 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-11-06 19:14:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-11-06 19:14:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-11-06 19:14:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-11-06 19:14:43,562 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 380 [2019-11-06 19:14:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:43,562 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-11-06 19:14:43,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-11-06 19:14:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2019-11-06 19:14:43,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:43,577 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:43,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:43,781 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1583114957, now seen corresponding path program 1 times [2019-11-06 19:14:43,782 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:43,782 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972101977] [2019-11-06 19:14:43,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 390 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:14:44,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972101977] [2019-11-06 19:14:44,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957488007] [2019-11-06 19:14:44,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:44,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:44,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 672 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-06 19:14:44,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:44,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:14:44,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652858284] [2019-11-06 19:14:44,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:44,981 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:44,982 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-11-06 19:14:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:46,913 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-11-06 19:14:46,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:14:46,913 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 490 [2019-11-06 19:14:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:46,925 INFO L225 Difference]: With dead ends: 5490 [2019-11-06 19:14:46,926 INFO L226 Difference]: Without dead ends: 2846 [2019-11-06 19:14:46,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 503 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-11-06 19:14:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-11-06 19:14:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-11-06 19:14:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-11-06 19:14:47,027 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 490 [2019-11-06 19:14:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:47,028 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-11-06 19:14:47,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-11-06 19:14:47,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2019-11-06 19:14:47,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:47,037 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:47,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:47,241 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1191523692, now seen corresponding path program 1 times [2019-11-06 19:14:47,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:47,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160213003] [2019-11-06 19:14:47,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 523 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:14:48,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160213003] [2019-11-06 19:14:48,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345230859] [2019-11-06 19:14:48,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:48,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:14:48,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:48,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 884 proven. 2 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-11-06 19:14:49,559 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:49,559 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:14:49,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818491822] [2019-11-06 19:14:49,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:14:49,561 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:49,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:14:49,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:49,562 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-11-06 19:14:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:51,655 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-11-06 19:14:51,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:14:51,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 574 [2019-11-06 19:14:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:51,667 INFO L225 Difference]: With dead ends: 5780 [2019-11-06 19:14:51,667 INFO L226 Difference]: Without dead ends: 3085 [2019-11-06 19:14:51,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 593 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:14:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-11-06 19:14:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-11-06 19:14:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-11-06 19:14:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-11-06 19:14:51,733 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 574 [2019-11-06 19:14:51,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:51,734 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-11-06 19:14:51,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:14:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-11-06 19:14:51,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2019-11-06 19:14:51,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:51,743 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:51,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:51,956 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1767004544, now seen corresponding path program 2 times [2019-11-06 19:14:51,957 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:51,957 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073451827] [2019-11-06 19:14:51,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 746 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-11-06 19:14:53,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073451827] [2019-11-06 19:14:53,148 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754035265] [2019-11-06 19:14:53,148 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:53,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:14:53,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:14:53,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:14:53,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:53,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:14:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 936 proven. 2 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-06 19:14:53,767 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:53,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-11-06 19:14:53,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134185360] [2019-11-06 19:14:53,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:14:53,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:14:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:53,770 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.