/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:29,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:29,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:29,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:07:29,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:07:29,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:07:29,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:07:29,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:07:29,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:07:29,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:07:29,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:07:29,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:07:29,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:29,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:29,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:29,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:29,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:29,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:29,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:29,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:29,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:29,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:29,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:29,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:29,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:07:29,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:07:29,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:07:29,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:07:29,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:07:29,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:07:29,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:07:29,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:07:29,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:07:29,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:07:29,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:07:29,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:07:29,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:07:29,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:07:29,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:29,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:29,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:29,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:07:29,400 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:29,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:29,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:29,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:29,401 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:29,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:29,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:29,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:29,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:29,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:29,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:29,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:29,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:29,403 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:29,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:29,403 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:29,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:29,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:29,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:29,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:29,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:29,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:29,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:29,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:29,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:29,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:29,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:29,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:29,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:29,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:29,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:29,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:29,724 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:29,725 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:29,725 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-11-06 19:07:29,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51394a32f/f43f72adf0c34fa5b32de99b33f1b90b/FLAG8c97cd423 [2019-11-06 19:07:30,508 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:30,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label04.c [2019-11-06 19:07:30,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51394a32f/f43f72adf0c34fa5b32de99b33f1b90b/FLAG8c97cd423 [2019-11-06 19:07:30,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51394a32f/f43f72adf0c34fa5b32de99b33f1b90b [2019-11-06 19:07:30,709 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:30,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:30,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:30,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:30,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:30,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:30" (1/1) ... [2019-11-06 19:07:30,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d998f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:30, skipping insertion in model container [2019-11-06 19:07:30,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:30" (1/1) ... [2019-11-06 19:07:30,728 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:30,787 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:31,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:31,432 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:31,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:31,732 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:31,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31 WrapperNode [2019-11-06 19:07:31,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:31,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:31,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:31,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:31,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... [2019-11-06 19:07:31,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:31,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:31,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:31,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:31,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:31,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:31,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:31,982 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:31,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:33,757 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:33,757 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:33,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:33 BoogieIcfgContainer [2019-11-06 19:07:33,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:33,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:33,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:33,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:33,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:30" (1/3) ... [2019-11-06 19:07:33,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654b247c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:33, skipping insertion in model container [2019-11-06 19:07:33,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:31" (2/3) ... [2019-11-06 19:07:33,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654b247c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:33, skipping insertion in model container [2019-11-06 19:07:33,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:33" (3/3) ... [2019-11-06 19:07:33,769 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label04.c [2019-11-06 19:07:33,779 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:33,788 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:33,800 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:33,831 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:33,831 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:33,831 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:33,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:33,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:33,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:33,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:33,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:07:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 19:07:33,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:33,890 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:33,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:33,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1796892554, now seen corresponding path program 1 times [2019-11-06 19:07:33,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:33,908 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878300841] [2019-11-06 19:07:33,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:34,508 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878300841] [2019-11-06 19:07:34,509 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:34,509 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:07:34,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298476071] [2019-11-06 19:07:34,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:34,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:34,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:07:34,540 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:07:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:38,102 INFO L93 Difference]: Finished difference Result 993 states and 1777 transitions. [2019-11-06 19:07:38,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:07:38,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-11-06 19:07:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:38,124 INFO L225 Difference]: With dead ends: 993 [2019-11-06 19:07:38,124 INFO L226 Difference]: Without dead ends: 632 [2019-11-06 19:07:38,132 INFO L630 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 [2019-11-06 19:07:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-06 19:07:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2019-11-06 19:07:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 19:07:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-11-06 19:07:38,245 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 59 [2019-11-06 19:07:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:38,245 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-11-06 19:07:38,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:07:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-11-06 19:07:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 19:07:38,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:38,254 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:38,254 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -676009126, now seen corresponding path program 1 times [2019-11-06 19:07:38,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:38,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394170005] [2019-11-06 19:07:38,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:38,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394170005] [2019-11-06 19:07:38,638 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:38,639 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:07:38,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194482222] [2019-11-06 19:07:38,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:07:38,643 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:07:38,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:07:38,644 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states. [2019-11-06 19:07:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:41,542 INFO L93 Difference]: Finished difference Result 1873 states and 2696 transitions. [2019-11-06 19:07:41,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:07:41,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2019-11-06 19:07:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:41,553 INFO L225 Difference]: With dead ends: 1873 [2019-11-06 19:07:41,553 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 19:07:41,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:07:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 19:07:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226. [2019-11-06 19:07:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-11-06 19:07:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions. [2019-11-06 19:07:41,611 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 139 [2019-11-06 19:07:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:41,612 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions. [2019-11-06 19:07:41,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:07:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions. [2019-11-06 19:07:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-06 19:07:41,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:41,619 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:41,619 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:41,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:41,620 INFO L82 PathProgramCache]: Analyzing trace with hash 828635490, now seen corresponding path program 1 times [2019-11-06 19:07:41,620 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:41,620 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043899915] [2019-11-06 19:07:41,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:41,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043899915] [2019-11-06 19:07:41,945 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839444317] [2019-11-06 19:07:41,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:42,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:42,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:42,233 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:42,234 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-06 19:07:42,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748220689] [2019-11-06 19:07:42,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:07:42,235 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:07:42,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:07:42,236 INFO L87 Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states. [2019-11-06 19:07:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:43,317 INFO L93 Difference]: Finished difference Result 3612 states and 4883 transitions. [2019-11-06 19:07:43,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:07:43,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2019-11-06 19:07:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:43,331 INFO L225 Difference]: With dead ends: 3612 [2019-11-06 19:07:43,332 INFO L226 Difference]: Without dead ends: 2392 [2019-11-06 19:07:43,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:07:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2019-11-06 19:07:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189. [2019-11-06 19:07:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2189 states. [2019-11-06 19:07:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions. [2019-11-06 19:07:43,438 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 190 [2019-11-06 19:07:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:43,440 INFO L462 AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions. [2019-11-06 19:07:43,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:07:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions. [2019-11-06 19:07:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 19:07:43,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:43,452 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:43,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:43,658 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1126757590, now seen corresponding path program 1 times [2019-11-06 19:07:43,659 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:43,659 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112412258] [2019-11-06 19:07:43,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:07:44,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112412258] [2019-11-06 19:07:44,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12761424] [2019-11-06 19:07:44,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:44,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:07:44,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-06 19:07:44,278 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:44,279 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:07:44,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238661885] [2019-11-06 19:07:44,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:44,281 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:07:44,282 INFO L87 Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states. [2019-11-06 19:07:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:45,822 INFO L93 Difference]: Finished difference Result 5406 states and 7546 transitions. [2019-11-06 19:07:45,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:07:45,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2019-11-06 19:07:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:45,842 INFO L225 Difference]: With dead ends: 5406 [2019-11-06 19:07:45,842 INFO L226 Difference]: Without dead ends: 3223 [2019-11-06 19:07:45,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:07:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2019-11-06 19:07:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183. [2019-11-06 19:07:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2019-11-06 19:07:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4270 transitions. [2019-11-06 19:07:45,941 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4270 transitions. Word has length 225 [2019-11-06 19:07:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:45,942 INFO L462 AbstractCegarLoop]: Abstraction has 3183 states and 4270 transitions. [2019-11-06 19:07:45,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:07:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4270 transitions. [2019-11-06 19:07:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-06 19:07:45,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:45,948 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:46,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:46,152 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash 654768965, now seen corresponding path program 1 times [2019-11-06 19:07:46,154 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:46,154 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360148052] [2019-11-06 19:07:46,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:07:46,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360148052] [2019-11-06 19:07:46,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542630355] [2019-11-06 19:07:46,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:46,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:46,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:07:46,690 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:46,690 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:07:46,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317166390] [2019-11-06 19:07:46,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:07:46,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:46,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:07:46,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:46,692 INFO L87 Difference]: Start difference. First operand 3183 states and 4270 transitions. Second operand 3 states. [2019-11-06 19:07:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:47,662 INFO L93 Difference]: Finished difference Result 7147 states and 9731 transitions. [2019-11-06 19:07:47,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:07:47,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2019-11-06 19:07:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:47,699 INFO L225 Difference]: With dead ends: 7147 [2019-11-06 19:07:47,700 INFO L226 Difference]: Without dead ends: 4158 [2019-11-06 19:07:47,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2019-11-06 19:07:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3953. [2019-11-06 19:07:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3953 states. [2019-11-06 19:07:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 5305 transitions. [2019-11-06 19:07:47,822 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 5305 transitions. Word has length 226 [2019-11-06 19:07:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:47,823 INFO L462 AbstractCegarLoop]: Abstraction has 3953 states and 5305 transitions. [2019-11-06 19:07:47,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:07:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 5305 transitions. [2019-11-06 19:07:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 19:07:47,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:47,833 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:48,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:48,037 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1068121551, now seen corresponding path program 1 times [2019-11-06 19:07:48,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:48,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471887589] [2019-11-06 19:07:48,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 7 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 19:07:48,485 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471887589] [2019-11-06 19:07:48,485 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343825468] [2019-11-06 19:07:48,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:48,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:07:48,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:48,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:48,699 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2019-11-06 19:07:48,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169270610] [2019-11-06 19:07:48,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 19:07:48,701 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:48,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 19:07:48,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:07:48,702 INFO L87 Difference]: Start difference. First operand 3953 states and 5305 transitions. Second operand 14 states. [2019-11-06 19:08:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:01,811 INFO L93 Difference]: Finished difference Result 14359 states and 21427 transitions. [2019-11-06 19:08:01,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-11-06 19:08:01,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 271 [2019-11-06 19:08:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:01,870 INFO L225 Difference]: With dead ends: 14359 [2019-11-06 19:08:01,870 INFO L226 Difference]: Without dead ends: 10600 [2019-11-06 19:08:01,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1213, Invalid=5927, Unknown=0, NotChecked=0, Total=7140 [2019-11-06 19:08:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10600 states. [2019-11-06 19:08:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10600 to 9889. [2019-11-06 19:08:02,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9889 states. [2019-11-06 19:08:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 13534 transitions. [2019-11-06 19:08:02,207 INFO L78 Accepts]: Start accepts. Automaton has 9889 states and 13534 transitions. Word has length 271 [2019-11-06 19:08:02,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:02,208 INFO L462 AbstractCegarLoop]: Abstraction has 9889 states and 13534 transitions. [2019-11-06 19:08:02,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 19:08:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9889 states and 13534 transitions. [2019-11-06 19:08:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-06 19:08:02,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:02,222 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:02,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:02,427 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1870221570, now seen corresponding path program 1 times [2019-11-06 19:08:02,428 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:02,429 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214206996] [2019-11-06 19:08:02,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:02,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214206996] [2019-11-06 19:08:02,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791378854] [2019-11-06 19:08:02,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:02,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:02,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:02,976 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:02,976 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:08:02,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501861923] [2019-11-06 19:08:02,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:02,978 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:02,979 INFO L87 Difference]: Start difference. First operand 9889 states and 13534 transitions. Second operand 3 states. [2019-11-06 19:08:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:04,325 INFO L93 Difference]: Finished difference Result 22828 states and 31926 transitions. [2019-11-06 19:08:04,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:04,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2019-11-06 19:08:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:04,384 INFO L225 Difference]: With dead ends: 22828 [2019-11-06 19:08:04,385 INFO L226 Difference]: Without dead ends: 13323 [2019-11-06 19:08:04,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:04,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13323 states. [2019-11-06 19:08:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13323 to 11805. [2019-11-06 19:08:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11805 states. [2019-11-06 19:08:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 15835 transitions. [2019-11-06 19:08:04,767 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 15835 transitions. Word has length 276 [2019-11-06 19:08:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:04,768 INFO L462 AbstractCegarLoop]: Abstraction has 11805 states and 15835 transitions. [2019-11-06 19:08:04,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 15835 transitions. [2019-11-06 19:08:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-11-06 19:08:04,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:04,793 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:05,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:05,007 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:05,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1456020950, now seen corresponding path program 1 times [2019-11-06 19:08:05,008 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:05,008 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311875849] [2019-11-06 19:08:05,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 303 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 19:08:05,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311875849] [2019-11-06 19:08:05,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922910799] [2019-11-06 19:08:05,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:05,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:05,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 310 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:08:05,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:05,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:08:05,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588709908] [2019-11-06 19:08:05,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:05,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:05,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:05,662 INFO L87 Difference]: Start difference. First operand 11805 states and 15835 transitions. Second operand 8 states.