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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:13,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:13,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:13,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:13,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:13,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:13,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:13,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:13,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:13,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:13,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:13,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:13,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:13,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:13,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:13,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:13,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:13,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:13,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:13,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:13,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:13,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:13,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:13,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:13,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:13,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:13,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:13,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:13,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:13,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:13,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:13,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:13,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:13,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:13,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:13,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:13,473 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 [2019-10-13 18:02:13,495 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:13,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:13,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:13,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:13,498 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:13,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:13,499 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:13,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:13,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:13,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:13,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:13,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:13,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:13,501 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:13,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:13,502 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:13,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:13,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:13,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:13,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:13,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:13,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:13,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:13,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:13,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:13,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:13,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:13,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:13,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:13,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:13,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:13,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:13,803 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:13,804 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:13,805 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-10-13 18:02:13,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b5041db/916b9eb07998440fb1607cdca300e112/FLAGe405a4c20 [2019-10-13 18:02:14,479 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:14,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-10-13 18:02:14,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b5041db/916b9eb07998440fb1607cdca300e112/FLAGe405a4c20 [2019-10-13 18:02:14,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b5041db/916b9eb07998440fb1607cdca300e112 [2019-10-13 18:02:14,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:14,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:14,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:14,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:14,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:14,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924bc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14, skipping insertion in model container [2019-10-13 18:02:14,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,766 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:14,831 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:15,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:15,696 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:15,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:15,859 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:15,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15 WrapperNode [2019-10-13 18:02:15,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:15,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:15,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:15,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:15,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (1/1) ... [2019-10-13 18:02:15,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:15,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:15,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:15,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:15,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (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 [2019-10-13 18:02:16,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:16,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:16,070 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:16,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:16,071 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:16,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:16,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:17,604 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:17,604 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:17,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:17 BoogieIcfgContainer [2019-10-13 18:02:17,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:17,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:17,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:17,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:17,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:14" (1/3) ... [2019-10-13 18:02:17,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe69cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:17, skipping insertion in model container [2019-10-13 18:02:17,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:15" (2/3) ... [2019-10-13 18:02:17,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe69cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:17, skipping insertion in model container [2019-10-13 18:02:17,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:17" (3/3) ... [2019-10-13 18:02:17,614 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label10.c [2019-10-13 18:02:17,624 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:17,633 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:17,644 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:17,673 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:17,673 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:17,674 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:17,674 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:17,674 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:17,674 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:17,674 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:17,674 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 18:02:17,707 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:17,708 INFO L380 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] [2019-10-13 18:02:17,710 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:17,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1708821435, now seen corresponding path program 1 times [2019-10-13 18:02:17,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:17,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012255922] [2019-10-13 18:02:17,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:17,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:17,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:18,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012255922] [2019-10-13 18:02:18,088 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:18,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:18,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260638211] [2019-10-13 18:02:18,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:18,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:18,119 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:20,823 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-13 18:02:20,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:20,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-10-13 18:02:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:20,845 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:02:20,846 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:20,856 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:02:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:02:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-10-13 18:02:20,954 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 34 [2019-10-13 18:02:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:20,955 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-10-13 18:02:20,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-10-13 18:02:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 18:02:20,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:20,967 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:20,967 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:20,968 INFO L82 PathProgramCache]: Analyzing trace with hash 491390794, now seen corresponding path program 1 times [2019-10-13 18:02:20,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:20,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318515203] [2019-10-13 18:02:20,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:20,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:20,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:21,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318515203] [2019-10-13 18:02:21,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985978731] [2019-10-13 18:02:21,274 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 [2019-10-13 18:02:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:21,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:21,483 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:21,484 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:21,484 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288805765] [2019-10-13 18:02:21,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:21,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:21,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:21,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:21,490 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-10-13 18:02:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:22,363 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-10-13 18:02:22,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:22,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-10-13 18:02:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:22,374 INFO L225 Difference]: With dead ends: 1666 [2019-10-13 18:02:22,374 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:02:22,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:02:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-13 18:02:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 18:02:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-10-13 18:02:22,450 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 146 [2019-10-13 18:02:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:22,451 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-10-13 18:02:22,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-10-13 18:02:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 18:02:22,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:22,457 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:22,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:22,669 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash -404806138, now seen corresponding path program 1 times [2019-10-13 18:02:22,670 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:22,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668287463] [2019-10-13 18:02:22,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:22,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668287463] [2019-10-13 18:02:22,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062081545] [2019-10-13 18:02:22,961 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 [2019-10-13 18:02:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:23,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:23,138 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:23,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:23,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269089982] [2019-10-13 18:02:23,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:23,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:23,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:23,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:23,142 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-10-13 18:02:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:24,137 INFO L93 Difference]: Finished difference Result 3138 states and 4371 transitions. [2019-10-13 18:02:24,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:24,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-10-13 18:02:24,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:24,160 INFO L225 Difference]: With dead ends: 3138 [2019-10-13 18:02:24,160 INFO L226 Difference]: Without dead ends: 2032 [2019-10-13 18:02:24,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-10-13 18:02:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-10-13 18:02:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-10-13 18:02:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2695 transitions. [2019-10-13 18:02:24,249 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2695 transitions. Word has length 164 [2019-10-13 18:02:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:24,252 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2695 transitions. [2019-10-13 18:02:24,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2695 transitions. [2019-10-13 18:02:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-13 18:02:24,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:24,265 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:24,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:24,470 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash -412172690, now seen corresponding path program 1 times [2019-10-13 18:02:24,471 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:24,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180955016] [2019-10-13 18:02:24,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:24,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:24,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:24,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180955016] [2019-10-13 18:02:24,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987309177] [2019-10-13 18:02:24,745 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 [2019-10-13 18:02:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:24,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:24,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:24,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:24,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389010000] [2019-10-13 18:02:24,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:24,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:24,929 INFO L87 Difference]: Start difference. First operand 2032 states and 2695 transitions. Second operand 3 states. [2019-10-13 18:02:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:25,780 INFO L93 Difference]: Finished difference Result 4792 states and 6475 transitions. [2019-10-13 18:02:25,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:25,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-10-13 18:02:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:25,798 INFO L225 Difference]: With dead ends: 4792 [2019-10-13 18:02:25,798 INFO L226 Difference]: Without dead ends: 2766 [2019-10-13 18:02:25,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2019-10-13 18:02:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2766. [2019-10-13 18:02:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2766 states. [2019-10-13 18:02:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3606 transitions. [2019-10-13 18:02:25,897 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3606 transitions. Word has length 219 [2019-10-13 18:02:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:25,897 INFO L462 AbstractCegarLoop]: Abstraction has 2766 states and 3606 transitions. [2019-10-13 18:02:25,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:25,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3606 transitions. [2019-10-13 18:02:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-13 18:02:25,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:25,905 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:26,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:26,120 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -306475396, now seen corresponding path program 1 times [2019-10-13 18:02:26,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:26,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612767934] [2019-10-13 18:02:26,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:26,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:26,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:26,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612767934] [2019-10-13 18:02:26,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939366743] [2019-10-13 18:02:26,582 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 [2019-10-13 18:02:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:26,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:26,780 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:26,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:26,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416601832] [2019-10-13 18:02:26,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:26,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:26,783 INFO L87 Difference]: Start difference. First operand 2766 states and 3606 transitions. Second operand 11 states. [2019-10-13 18:02:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:30,363 INFO L93 Difference]: Finished difference Result 6888 states and 10127 transitions. [2019-10-13 18:02:30,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:02:30,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 243 [2019-10-13 18:02:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:30,402 INFO L225 Difference]: With dead ends: 6888 [2019-10-13 18:02:30,403 INFO L226 Difference]: Without dead ends: 4310 [2019-10-13 18:02:30,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-10-13 18:02:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-13 18:02:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4194. [2019-10-13 18:02:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4194 states. [2019-10-13 18:02:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 5850 transitions. [2019-10-13 18:02:30,631 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 5850 transitions. Word has length 243 [2019-10-13 18:02:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:30,632 INFO L462 AbstractCegarLoop]: Abstraction has 4194 states and 5850 transitions. [2019-10-13 18:02:30,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 5850 transitions. [2019-10-13 18:02:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-13 18:02:30,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:30,641 INFO L380 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, 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, 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] [2019-10-13 18:02:30,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,845 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:30,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:30,846 INFO L82 PathProgramCache]: Analyzing trace with hash -285891538, now seen corresponding path program 1 times [2019-10-13 18:02:30,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:30,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103067002] [2019-10-13 18:02:30,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:02:31,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103067002] [2019-10-13 18:02:31,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484150901] [2019-10-13 18:02:31,090 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 [2019-10-13 18:02:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:31,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:02:31,230 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:31,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:31,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476932995] [2019-10-13 18:02:31,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:31,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:31,232 INFO L87 Difference]: Start difference. First operand 4194 states and 5850 transitions. Second operand 3 states. [2019-10-13 18:02:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:32,165 INFO L93 Difference]: Finished difference Result 8404 states and 12063 transitions. [2019-10-13 18:02:32,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:32,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2019-10-13 18:02:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:32,191 INFO L225 Difference]: With dead ends: 8404 [2019-10-13 18:02:32,191 INFO L226 Difference]: Without dead ends: 4582 [2019-10-13 18:02:32,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2019-10-13 18:02:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4392. [2019-10-13 18:02:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4392 states. [2019-10-13 18:02:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6310 transitions. [2019-10-13 18:02:32,329 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6310 transitions. Word has length 251 [2019-10-13 18:02:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:32,330 INFO L462 AbstractCegarLoop]: Abstraction has 4392 states and 6310 transitions. [2019-10-13 18:02:32,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6310 transitions. [2019-10-13 18:02:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-10-13 18:02:32,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:32,339 INFO L380 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, 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, 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] [2019-10-13 18:02:32,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:32,544 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:32,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1025932110, now seen corresponding path program 1 times [2019-10-13 18:02:32,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:32,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325013603] [2019-10-13 18:02:32,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-13 18:02:32,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325013603] [2019-10-13 18:02:32,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128222601] [2019-10-13 18:02:32,789 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 [2019-10-13 18:02:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:32,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-13 18:02:33,001 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:33,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:33,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760178683] [2019-10-13 18:02:33,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:33,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:33,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:33,003 INFO L87 Difference]: Start difference. First operand 4392 states and 6310 transitions. Second operand 3 states. [2019-10-13 18:02:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:33,816 INFO L93 Difference]: Finished difference Result 6296 states and 9494 transitions. [2019-10-13 18:02:33,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:33,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2019-10-13 18:02:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:33,855 INFO L225 Difference]: With dead ends: 6296 [2019-10-13 18:02:33,855 INFO L226 Difference]: Without dead ends: 6294 [2019-10-13 18:02:33,861 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2019-10-13 18:02:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 4608. [2019-10-13 18:02:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4608 states. [2019-10-13 18:02:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 6893 transitions. [2019-10-13 18:02:34,029 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 6893 transitions. Word has length 265 [2019-10-13 18:02:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:34,030 INFO L462 AbstractCegarLoop]: Abstraction has 4608 states and 6893 transitions. [2019-10-13 18:02:34,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 6893 transitions. [2019-10-13 18:02:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-13 18:02:34,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:34,043 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:34,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,248 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:34,248 INFO L82 PathProgramCache]: Analyzing trace with hash -672442673, now seen corresponding path program 1 times [2019-10-13 18:02:34,249 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:34,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060694327] [2019-10-13 18:02:34,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:34,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:34,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:34,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060694327] [2019-10-13 18:02:34,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777660306] [2019-10-13 18:02:34,763 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 [2019-10-13 18:02:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:34,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:34,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:34,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:34,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226882872] [2019-10-13 18:02:34,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:34,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:34,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:34,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:34,999 INFO L87 Difference]: Start difference. First operand 4608 states and 6893 transitions. Second operand 11 states. [2019-10-13 18:02:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:39,162 INFO L93 Difference]: Finished difference Result 13402 states and 24258 transitions. [2019-10-13 18:02:39,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:02:39,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 270 [2019-10-13 18:02:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:39,263 INFO L225 Difference]: With dead ends: 13402 [2019-10-13 18:02:39,264 INFO L226 Difference]: Without dead ends: 7598 [2019-10-13 18:02:39,312 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:02:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2019-10-13 18:02:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 6556. [2019-10-13 18:02:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6556 states. [2019-10-13 18:02:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10393 transitions. [2019-10-13 18:02:39,807 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10393 transitions. Word has length 270 [2019-10-13 18:02:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:39,807 INFO L462 AbstractCegarLoop]: Abstraction has 6556 states and 10393 transitions. [2019-10-13 18:02:39,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10393 transitions. [2019-10-13 18:02:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-10-13 18:02:39,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:39,826 INFO L380 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, 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, 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] [2019-10-13 18:02:40,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:40,032 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2054792803, now seen corresponding path program 1 times [2019-10-13 18:02:40,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:40,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450190732] [2019-10-13 18:02:40,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:40,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:40,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:02:40,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450190732] [2019-10-13 18:02:40,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785470427] [2019-10-13 18:02:40,507 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 [2019-10-13 18:02:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:40,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:40,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:40,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:02:40,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822141360] [2019-10-13 18:02:40,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:40,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:40,890 INFO L87 Difference]: Start difference. First operand 6556 states and 10393 transitions. Second operand 11 states. [2019-10-13 18:02:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:42,998 INFO L93 Difference]: Finished difference Result 11174 states and 17838 transitions. [2019-10-13 18:02:42,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:02:42,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 296 [2019-10-13 18:02:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:43,026 INFO L225 Difference]: With dead ends: 11174 [2019-10-13 18:02:43,026 INFO L226 Difference]: Without dead ends: 4990 [2019-10-13 18:02:43,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2019-10-13 18:02:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4816. [2019-10-13 18:02:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4816 states. [2019-10-13 18:02:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6215 transitions. [2019-10-13 18:02:43,211 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6215 transitions. Word has length 296 [2019-10-13 18:02:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:43,212 INFO L462 AbstractCegarLoop]: Abstraction has 4816 states and 6215 transitions. [2019-10-13 18:02:43,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6215 transitions. [2019-10-13 18:02:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-10-13 18:02:43,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:43,224 INFO L380 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, 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, 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] [2019-10-13 18:02:43,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:43,432 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1461255374, now seen corresponding path program 1 times [2019-10-13 18:02:43,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:43,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272264121] [2019-10-13 18:02:43,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:43,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:43,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:43,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272264121] [2019-10-13 18:02:43,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876062734] [2019-10-13 18:02:43,899 INFO L94 rtionOrderModulation]: Keeping assertion order 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:44,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:44,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 18:02:44,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:44,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 18:02:44,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930235521] [2019-10-13 18:02:44,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:44,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:44,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:44,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:44,175 INFO L87 Difference]: Start difference. First operand 4816 states and 6215 transitions. Second operand 5 states. [2019-10-13 18:02:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:45,613 INFO L93 Difference]: Finished difference Result 9276 states and 12046 transitions. [2019-10-13 18:02:45,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:45,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 299 [2019-10-13 18:02:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:45,629 INFO L225 Difference]: With dead ends: 9276 [2019-10-13 18:02:45,629 INFO L226 Difference]: Without dead ends: 4640 [2019-10-13 18:02:45,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2019-10-13 18:02:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4628. [2019-10-13 18:02:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4628 states. [2019-10-13 18:02:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 5907 transitions. [2019-10-13 18:02:45,880 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 5907 transitions. Word has length 299 [2019-10-13 18:02:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:45,881 INFO L462 AbstractCegarLoop]: Abstraction has 4628 states and 5907 transitions. [2019-10-13 18:02:45,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:45,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 5907 transitions. [2019-10-13 18:02:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-10-13 18:02:45,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:45,897 INFO L380 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, 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, 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] [2019-10-13 18:02:46,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:46,101 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1622012121, now seen corresponding path program 1 times [2019-10-13 18:02:46,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:46,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096530696] [2019-10-13 18:02:46,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:47,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096530696] [2019-10-13 18:02:47,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059696304] [2019-10-13 18:02:47,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:47,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:47,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 280 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 18:02:48,107 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:48,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:48,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556531047] [2019-10-13 18:02:48,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:48,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:48,110 INFO L87 Difference]: Start difference. First operand 4628 states and 5907 transitions. Second operand 16 states.