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/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:49,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:49,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:49,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:49,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:49,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:49,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:49,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:49,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:49,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:49,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:49,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:49,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:49,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:49,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:49,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:49,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:49,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:49,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:49,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:49,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:49,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:49,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:49,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:49,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:49,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:49,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:49,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:49,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:49,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:49,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:49,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:49,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:49,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:49,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:49,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:49,740 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 18:03:49,773 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:49,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:49,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:49,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:49,778 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:49,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:49,779 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:49,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:49,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:49,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:49,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:49,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:49,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:49,783 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:49,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:49,783 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:49,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:49,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:49,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:49,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:49,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:49,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:49,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:49,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:49,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:49,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:49,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:49,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:49,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:50,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:50,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:50,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:50,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:50,076 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:50,077 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-13 18:03:50,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/499cc672f/021475180d6943b2940bb85d695d9a02/FLAG417e1c5fa [2019-10-13 18:03:50,903 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:50,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-13 18:03:50,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/499cc672f/021475180d6943b2940bb85d695d9a02/FLAG417e1c5fa [2019-10-13 18:03:50,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/499cc672f/021475180d6943b2940bb85d695d9a02 [2019-10-13 18:03:51,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:51,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:51,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:51,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:51,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:51,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:50" (1/1) ... [2019-10-13 18:03:51,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a2e2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:51, skipping insertion in model container [2019-10-13 18:03:51,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:50" (1/1) ... [2019-10-13 18:03:51,026 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:51,101 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:51,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:51,931 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:52,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:52,374 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:52,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52 WrapperNode [2019-10-13 18:03:52,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:52,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:52,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:52,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:52,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (1/1) ... [2019-10-13 18:03:52,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:52,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:52,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:52,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:52,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (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 18:03:52,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:03:52,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:52,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:03:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:52,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:52,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:56,655 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:56,655 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:56,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:56 BoogieIcfgContainer [2019-10-13 18:03:56,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:56,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:56,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:56,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:56,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:50" (1/3) ... [2019-10-13 18:03:56,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c67d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:56, skipping insertion in model container [2019-10-13 18:03:56,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:52" (2/3) ... [2019-10-13 18:03:56,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9c67d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:56, skipping insertion in model container [2019-10-13 18:03:56,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:56" (3/3) ... [2019-10-13 18:03:56,667 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-10-13 18:03:56,681 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:56,691 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:56,709 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:56,748 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:56,748 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:56,748 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:56,748 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:56,749 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:56,749 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:56,749 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:56,749 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:03:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 18:03:56,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:56,793 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] [2019-10-13 18:03:56,795 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:56,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1047931325, now seen corresponding path program 1 times [2019-10-13 18:03:56,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:56,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381575916] [2019-10-13 18:03:56,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:56,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:56,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:57,342 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 18:03:57,343 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381575916] [2019-10-13 18:03:57,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:57,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:57,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644878345] [2019-10-13 18:03:57,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:57,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:57,368 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:03,902 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-10-13 18:04:03,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:03,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-10-13 18:04:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:03,937 INFO L225 Difference]: With dead ends: 1575 [2019-10-13 18:04:03,937 INFO L226 Difference]: Without dead ends: 1055 [2019-10-13 18:04:03,949 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 18:04:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-10-13 18:04:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-10-13 18:04:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-10-13 18:04:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-10-13 18:04:04,098 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 29 [2019-10-13 18:04:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:04,099 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-10-13 18:04:04,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-10-13 18:04:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 18:04:04,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:04,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:04,109 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:04,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:04,110 INFO L82 PathProgramCache]: Analyzing trace with hash 273136762, now seen corresponding path program 1 times [2019-10-13 18:04:04,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:04,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552383270] [2019-10-13 18:04:04,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:04,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:04,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552383270] [2019-10-13 18:04:04,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537259961] [2019-10-13 18:04:04,428 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 18:04:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:04,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:04,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:04,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:04,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:04,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475934377] [2019-10-13 18:04:04,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:04,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:04,584 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-10-13 18:04:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:06,882 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-10-13 18:04:06,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:06,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-13 18:04:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:06,894 INFO L225 Difference]: With dead ends: 2976 [2019-10-13 18:04:06,895 INFO L226 Difference]: Without dead ends: 1958 [2019-10-13 18:04:06,899 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 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 18:04:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-10-13 18:04:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-10-13 18:04:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-10-13 18:04:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-10-13 18:04:06,960 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 98 [2019-10-13 18:04:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:06,961 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-10-13 18:04:06,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-10-13 18:04:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 18:04:06,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:06,964 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:07,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:07,168 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:07,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:07,169 INFO L82 PathProgramCache]: Analyzing trace with hash -384198940, now seen corresponding path program 1 times [2019-10-13 18:04:07,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:07,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209974524] [2019-10-13 18:04:07,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:07,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:07,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:07,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209974524] [2019-10-13 18:04:07,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:07,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:07,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078050762] [2019-10-13 18:04:07,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:07,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:07,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:07,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:07,442 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-10-13 18:04:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:15,378 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-10-13 18:04:15,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:15,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 115 [2019-10-13 18:04:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:15,443 INFO L225 Difference]: With dead ends: 5861 [2019-10-13 18:04:15,444 INFO L226 Difference]: Without dead ends: 3912 [2019-10-13 18:04:15,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-10-13 18:04:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-10-13 18:04:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-13 18:04:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-10-13 18:04:15,544 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 115 [2019-10-13 18:04:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:15,545 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-10-13 18:04:15,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-10-13 18:04:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-13 18:04:15,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:15,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:15,550 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash -450063927, now seen corresponding path program 1 times [2019-10-13 18:04:15,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:15,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478435902] [2019-10-13 18:04:15,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:15,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:15,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:04:16,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478435902] [2019-10-13 18:04:16,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161054236] [2019-10-13 18:04:16,277 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 18:04:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:16,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:04:16,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:04:16,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:16,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 18:04:16,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683975539] [2019-10-13 18:04:16,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:16,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:16,524 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 8 states. [2019-10-13 18:04:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:25,355 INFO L93 Difference]: Finished difference Result 10289 states and 14532 transitions. [2019-10-13 18:04:25,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:04:25,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 303 [2019-10-13 18:04:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:25,396 INFO L225 Difference]: With dead ends: 10289 [2019-10-13 18:04:25,396 INFO L226 Difference]: Without dead ends: 7361 [2019-10-13 18:04:25,407 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2019-10-13 18:04:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 6723. [2019-10-13 18:04:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6723 states. [2019-10-13 18:04:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 9046 transitions. [2019-10-13 18:04:25,704 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 9046 transitions. Word has length 303 [2019-10-13 18:04:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:25,705 INFO L462 AbstractCegarLoop]: Abstraction has 6723 states and 9046 transitions. [2019-10-13 18:04:25,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:25,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 9046 transitions. [2019-10-13 18:04:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-10-13 18:04:25,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:25,725 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:25,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:25,929 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -412853253, now seen corresponding path program 1 times [2019-10-13 18:04:25,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:25,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821816319] [2019-10-13 18:04:25,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:25,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:25,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 231 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 18:04:26,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821816319] [2019-10-13 18:04:26,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305739691] [2019-10-13 18:04:26,477 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 18:04:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:26,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:04:26,830 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:26,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:04:26,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881080358] [2019-10-13 18:04:26,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:04:26,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:04:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:26,833 INFO L87 Difference]: Start difference. First operand 6723 states and 9046 transitions. Second operand 11 states.