/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:08:00,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:08:00,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:08:00,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:08:00,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:08:00,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:08:00,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:08:00,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:08:00,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:08:00,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:08:00,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:08:00,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:08:00,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:08:00,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:08:00,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:08:00,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:08:00,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:08:00,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:08:00,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:08:00,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:08:00,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:08:00,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:08:00,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:08:00,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:08:00,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:08:00,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:08:00,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:08:00,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:08:00,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:08:00,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:08:00,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:08:00,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:08:00,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:08:00,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:08:00,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:08:00,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:08:00,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:08:00,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:08:00,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:08:00,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:08:00,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:08:00,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:08:00,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:08:00,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:08:00,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:08:00,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:08:00,613 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:08:00,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:08:00,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:08:00,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:08:00,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:08:00,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:08:00,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:08:00,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:08:00,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:08:00,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:08:00,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:08:00,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:08:00,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:08:00,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:08:00,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:08:00,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:08:00,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:08:00,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:08:00,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:08:00,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:08:00,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:08:00,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:08:00,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:08:00,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:08:00,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:08:00,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:08:00,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:08:00,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:08:00,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:08:00,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:08:00,935 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:08:00,936 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:08:00,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69b908ebe/22272713dba848c6b791276c47b520b8/FLAGc75e7d716 [2020-10-12 20:08:01,510 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:08:01,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:08:01,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69b908ebe/22272713dba848c6b791276c47b520b8/FLAGc75e7d716 [2020-10-12 20:08:01,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69b908ebe/22272713dba848c6b791276c47b520b8 [2020-10-12 20:08:01,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:08:01,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:08:01,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:08:01,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:08:01,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:08:01,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:08:01" (1/1) ... [2020-10-12 20:08:01,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b30b002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:01, skipping insertion in model container [2020-10-12 20:08:01,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:08:01" (1/1) ... [2020-10-12 20:08:01,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:08:01,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:08:02,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:08:02,320 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:08:02,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:08:02,463 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:08:02,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02 WrapperNode [2020-10-12 20:08:02,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:08:02,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:08:02,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:08:02,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:08:02,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... [2020-10-12 20:08:02,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:08:02,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:08:02,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:08:02,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:08:02,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 20:08:02,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:08:02,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:08:02,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:08:02,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:08:02,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:08:02,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:08:02,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:08:02,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:08:02,584 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:08:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:08:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:08:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 20:08:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:08:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:08:02,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:08:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:08:02,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:08:03,316 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:08:03,317 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:08:03,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:08:03 BoogieIcfgContainer [2020-10-12 20:08:03,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:08:03,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:08:03,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:08:03,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:08:03,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:08:01" (1/3) ... [2020-10-12 20:08:03,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8203d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:08:03, skipping insertion in model container [2020-10-12 20:08:03,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:08:02" (2/3) ... [2020-10-12 20:08:03,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8203d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:08:03, skipping insertion in model container [2020-10-12 20:08:03,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:08:03" (3/3) ... [2020-10-12 20:08:03,331 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:08:03,341 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:08:03,350 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:08:03,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:08:03,387 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:08:03,387 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:08:03,387 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:08:03,387 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:08:03,388 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:08:03,388 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:08:03,388 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:08:03,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:08:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-10-12 20:08:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 20:08:03,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:03,423 INFO L422 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, 1, 1, 1, 1, 1] [2020-10-12 20:08:03,424 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1420273055, now seen corresponding path program 1 times [2020-10-12 20:08:03,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:03,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632381235] [2020-10-12 20:08:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:03,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:04,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:04,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:04,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:08,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:08,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 20:08:08,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:08:08,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4376 [2020-10-12 20:08:08,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:08:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:08:08,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 20:08:08,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:08:08,550 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:08,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:08,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:08,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:08,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:08,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:08:08,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:08,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:08,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632381235] [2020-10-12 20:08:08,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:08,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:08:08,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643527086] [2020-10-12 20:08:08,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:08:08,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:08,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:08:08,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:08,652 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 8 states. [2020-10-12 20:08:08,989 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-12 20:08:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:10,362 INFO L93 Difference]: Finished difference Result 732 states and 1157 transitions. [2020-10-12 20:08:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:08:10,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-12 20:08:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:10,400 INFO L225 Difference]: With dead ends: 732 [2020-10-12 20:08:10,400 INFO L226 Difference]: Without dead ends: 609 [2020-10-12 20:08:10,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-12 20:08:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-10-12 20:08:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 227. [2020-10-12 20:08:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 20:08:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 338 transitions. [2020-10-12 20:08:10,516 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 338 transitions. Word has length 64 [2020-10-12 20:08:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:10,517 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 338 transitions. [2020-10-12 20:08:10,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:08:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 338 transitions. [2020-10-12 20:08:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:08:10,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:10,530 INFO L422 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:10,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:08:10,530 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1097324455, now seen corresponding path program 1 times [2020-10-12 20:08:10,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:10,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822718790] [2020-10-12 20:08:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:10,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:10,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:11,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:12,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:12,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:08:12,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:08:12,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-12 20:08:12,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:08:12,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 20:08:12,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:08:12,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:08:13,148 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:13,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:13,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:13,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:13,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:13,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:13,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:08:13,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:13,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:13,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822718790] [2020-10-12 20:08:13,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:13,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:13,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743167217] [2020-10-12 20:08:13,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:08:13,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:08:13,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:13,210 INFO L87 Difference]: Start difference. First operand 227 states and 338 transitions. Second operand 5 states. [2020-10-12 20:08:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:14,277 INFO L93 Difference]: Finished difference Result 419 states and 641 transitions. [2020-10-12 20:08:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:08:14,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-12 20:08:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:14,282 INFO L225 Difference]: With dead ends: 419 [2020-10-12 20:08:14,282 INFO L226 Difference]: Without dead ends: 417 [2020-10-12 20:08:14,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:08:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-12 20:08:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 231. [2020-10-12 20:08:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-12 20:08:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 342 transitions. [2020-10-12 20:08:14,305 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 342 transitions. Word has length 65 [2020-10-12 20:08:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:14,306 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 342 transitions. [2020-10-12 20:08:14,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:08:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 342 transitions. [2020-10-12 20:08:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:08:14,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:14,308 INFO L422 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:14,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:08:14,309 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 352300048, now seen corresponding path program 1 times [2020-10-12 20:08:14,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:14,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756708978] [2020-10-12 20:08:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:14,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:14,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:14,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:14,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:15,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:15,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:15,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:08:15,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:08:15,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-12 20:08:15,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 20:08:15,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:08:15,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:16,044 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:16,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:16,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:16,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:16,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:16,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:16,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:08:16,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:16,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:16,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:16,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756708978] [2020-10-12 20:08:16,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:16,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:08:16,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695797189] [2020-10-12 20:08:16,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:08:16,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:08:16,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:08:16,089 INFO L87 Difference]: Start difference. First operand 231 states and 342 transitions. Second operand 4 states. [2020-10-12 20:08:16,312 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:08:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:16,908 INFO L93 Difference]: Finished difference Result 583 states and 896 transitions. [2020-10-12 20:08:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:08:16,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-12 20:08:16,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:16,912 INFO L225 Difference]: With dead ends: 583 [2020-10-12 20:08:16,912 INFO L226 Difference]: Without dead ends: 391 [2020-10-12 20:08:16,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-12 20:08:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 389. [2020-10-12 20:08:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-12 20:08:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 590 transitions. [2020-10-12 20:08:16,946 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 590 transitions. Word has length 66 [2020-10-12 20:08:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:16,947 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 590 transitions. [2020-10-12 20:08:16,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:08:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 590 transitions. [2020-10-12 20:08:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:08:16,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:16,948 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:16,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:08:16,949 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2125856610, now seen corresponding path program 1 times [2020-10-12 20:08:16,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:16,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371483884] [2020-10-12 20:08:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:17,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:17,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:17,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:08:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:08:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-12 20:08:17,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 20:08:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:08:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:17,955 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:17,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:17,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:17,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:17,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:08:17,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:17,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:17,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371483884] [2020-10-12 20:08:17,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:17,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:08:17,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479592399] [2020-10-12 20:08:17,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:08:17,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:08:17,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:08:17,992 INFO L87 Difference]: Start difference. First operand 389 states and 590 transitions. Second operand 4 states. [2020-10-12 20:08:18,165 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:08:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:18,993 INFO L93 Difference]: Finished difference Result 1025 states and 1588 transitions. [2020-10-12 20:08:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:08:18,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-12 20:08:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:18,998 INFO L225 Difference]: With dead ends: 1025 [2020-10-12 20:08:18,998 INFO L226 Difference]: Without dead ends: 675 [2020-10-12 20:08:19,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-12 20:08:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 673. [2020-10-12 20:08:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2020-10-12 20:08:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1032 transitions. [2020-10-12 20:08:19,056 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1032 transitions. Word has length 67 [2020-10-12 20:08:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:19,056 INFO L479 AbstractCegarLoop]: Abstraction has 673 states and 1032 transitions. [2020-10-12 20:08:19,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:08:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1032 transitions. [2020-10-12 20:08:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:08:19,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:19,057 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:19,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:08:19,058 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2090449583, now seen corresponding path program 1 times [2020-10-12 20:08:19,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:19,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330843443] [2020-10-12 20:08:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:19,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:19,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:19,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:19,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:08:19,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:08:19,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-12 20:08:19,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 20:08:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:08:19,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:19,611 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:19,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:19,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:19,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:19,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:08:19,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:19,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:19,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330843443] [2020-10-12 20:08:19,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:19,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:08:19,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183184430] [2020-10-12 20:08:19,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:08:19,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:08:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:08:19,647 INFO L87 Difference]: Start difference. First operand 673 states and 1032 transitions. Second operand 4 states. [2020-10-12 20:08:19,817 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:08:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:20,545 INFO L93 Difference]: Finished difference Result 1813 states and 2810 transitions. [2020-10-12 20:08:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:08:20,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-12 20:08:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:20,554 INFO L225 Difference]: With dead ends: 1813 [2020-10-12 20:08:20,554 INFO L226 Difference]: Without dead ends: 1179 [2020-10-12 20:08:20,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2020-10-12 20:08:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2020-10-12 20:08:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1177 states. [2020-10-12 20:08:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1808 transitions. [2020-10-12 20:08:20,630 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1808 transitions. Word has length 68 [2020-10-12 20:08:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:20,631 INFO L479 AbstractCegarLoop]: Abstraction has 1177 states and 1808 transitions. [2020-10-12 20:08:20,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:08:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1808 transitions. [2020-10-12 20:08:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:08:20,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:20,632 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:20,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:08:20,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:20,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1008460051, now seen corresponding path program 1 times [2020-10-12 20:08:20,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:20,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894823767] [2020-10-12 20:08:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:20,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:20,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:20,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:08:20,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-12 20:08:20,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 20:08:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:08:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:20,995 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:20,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:21,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:21,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:21,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:21,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:21,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:08:21,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:21,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:21,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:21,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:21,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:21,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894823767] [2020-10-12 20:08:21,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:21,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:08:21,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167432059] [2020-10-12 20:08:21,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:08:21,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:08:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:08:21,030 INFO L87 Difference]: Start difference. First operand 1177 states and 1808 transitions. Second operand 4 states. [2020-10-12 20:08:21,228 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:08:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:21,953 INFO L93 Difference]: Finished difference Result 3197 states and 4930 transitions. [2020-10-12 20:08:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:08:21,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-12 20:08:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:21,964 INFO L225 Difference]: With dead ends: 3197 [2020-10-12 20:08:21,964 INFO L226 Difference]: Without dead ends: 2059 [2020-10-12 20:08:21,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2020-10-12 20:08:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2057. [2020-10-12 20:08:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2020-10-12 20:08:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3144 transitions. [2020-10-12 20:08:22,122 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3144 transitions. Word has length 69 [2020-10-12 20:08:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:22,122 INFO L479 AbstractCegarLoop]: Abstraction has 2057 states and 3144 transitions. [2020-10-12 20:08:22,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:08:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3144 transitions. [2020-10-12 20:08:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:08:22,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:22,124 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:22,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:08:22,124 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2066727090, now seen corresponding path program 1 times [2020-10-12 20:08:22,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:22,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133657519] [2020-10-12 20:08:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:22,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:22,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:22,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:08:22,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-12 20:08:22,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:08:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 20:08:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 20:08:22,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:23,301 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:23,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:23,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:23,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:23,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:23,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:08:23,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:23,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133657519] [2020-10-12 20:08:23,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:23,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:08:23,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383879264] [2020-10-12 20:08:23,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:08:23,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:23,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:08:23,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:23,364 INFO L87 Difference]: Start difference. First operand 2057 states and 3144 transitions. Second operand 8 states. [2020-10-12 20:08:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:25,377 INFO L93 Difference]: Finished difference Result 10867 states and 16557 transitions. [2020-10-12 20:08:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:08:25,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-12 20:08:25,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:25,421 INFO L225 Difference]: With dead ends: 10867 [2020-10-12 20:08:25,422 INFO L226 Difference]: Without dead ends: 8849 [2020-10-12 20:08:25,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8849 states. [2020-10-12 20:08:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8849 to 8841. [2020-10-12 20:08:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8841 states. [2020-10-12 20:08:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 13416 transitions. [2020-10-12 20:08:26,093 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 13416 transitions. Word has length 70 [2020-10-12 20:08:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:26,094 INFO L479 AbstractCegarLoop]: Abstraction has 8841 states and 13416 transitions. [2020-10-12 20:08:26,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:08:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 13416 transitions. [2020-10-12 20:08:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:08:26,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:26,096 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:26,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:08:26,096 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2099406712, now seen corresponding path program 1 times [2020-10-12 20:08:26,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:26,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163604346] [2020-10-12 20:08:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:26,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:26,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:26,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:26,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:08:26,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:26,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-12 20:08:26,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:26,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:08:26,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:08:26,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 20:08:26,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:26,679 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:26,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:26,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:26,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:26,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:26,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 20:08:26,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:26,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:26,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:26,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:08:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:26,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163604346] [2020-10-12 20:08:26,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:26,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:08:26,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159043206] [2020-10-12 20:08:26,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:08:26,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:08:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:08:26,741 INFO L87 Difference]: Start difference. First operand 8841 states and 13416 transitions. Second operand 4 states. [2020-10-12 20:08:26,972 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-12 20:08:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:28,263 INFO L93 Difference]: Finished difference Result 24605 states and 37178 transitions. [2020-10-12 20:08:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:08:28,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-12 20:08:28,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:28,332 INFO L225 Difference]: With dead ends: 24605 [2020-10-12 20:08:28,333 INFO L226 Difference]: Without dead ends: 15803 [2020-10-12 20:08:28,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:28,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15803 states. [2020-10-12 20:08:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15803 to 15657. [2020-10-12 20:08:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15657 states. [2020-10-12 20:08:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 23368 transitions. [2020-10-12 20:08:29,524 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 23368 transitions. Word has length 72 [2020-10-12 20:08:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:29,525 INFO L479 AbstractCegarLoop]: Abstraction has 15657 states and 23368 transitions. [2020-10-12 20:08:29,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:08:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 23368 transitions. [2020-10-12 20:08:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:08:29,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:29,527 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:29,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:08:29,527 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash 943022991, now seen corresponding path program 1 times [2020-10-12 20:08:29,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:29,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673018559] [2020-10-12 20:08:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:29,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:29,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:29,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:29,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:08:29,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:08:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-12 20:08:29,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:08:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:08:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 20:08:29,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:30,025 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:30,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:30,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:30,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:30,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:08:30,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:30,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673018559] [2020-10-12 20:08:30,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:30,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:08:30,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192941461] [2020-10-12 20:08:30,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:08:30,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:08:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:08:30,071 INFO L87 Difference]: Start difference. First operand 15657 states and 23368 transitions. Second operand 5 states. [2020-10-12 20:08:30,265 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-12 20:08:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:32,034 INFO L93 Difference]: Finished difference Result 33023 states and 49659 transitions. [2020-10-12 20:08:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:08:32,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:08:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:32,102 INFO L225 Difference]: With dead ends: 33023 [2020-10-12 20:08:32,103 INFO L226 Difference]: Without dead ends: 24221 [2020-10-12 20:08:32,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:08:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24221 states. [2020-10-12 20:08:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24221 to 24057. [2020-10-12 20:08:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24057 states. [2020-10-12 20:08:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24057 states to 24057 states and 35800 transitions. [2020-10-12 20:08:33,938 INFO L78 Accepts]: Start accepts. Automaton has 24057 states and 35800 transitions. Word has length 72 [2020-10-12 20:08:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:33,938 INFO L479 AbstractCegarLoop]: Abstraction has 24057 states and 35800 transitions. [2020-10-12 20:08:33,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:08:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24057 states and 35800 transitions. [2020-10-12 20:08:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:08:33,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:33,941 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:08:33,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:08:33,941 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:33,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1599029350, now seen corresponding path program 1 times [2020-10-12 20:08:33,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:33,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617529246] [2020-10-12 20:08:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:33,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:34,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:34,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:35,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:35,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:08:35,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:08:35,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1744 [2020-10-12 20:08:35,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:08:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 20:08:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 20:08:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:35,951 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:35,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:35,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:35,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:35,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:35,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:35,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:08:35,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:35,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:35,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:35,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617529246] [2020-10-12 20:08:35,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:35,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:08:35,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625442607] [2020-10-12 20:08:35,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:08:35,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:08:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:35,991 INFO L87 Difference]: Start difference. First operand 24057 states and 35800 transitions. Second operand 8 states. [2020-10-12 20:08:36,194 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-12 20:08:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:39,321 INFO L93 Difference]: Finished difference Result 82936 states and 124910 transitions. [2020-10-12 20:08:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:08:39,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-12 20:08:39,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:39,478 INFO L225 Difference]: With dead ends: 82936 [2020-10-12 20:08:39,478 INFO L226 Difference]: Without dead ends: 71174 [2020-10-12 20:08:39,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:08:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71174 states. [2020-10-12 20:08:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71174 to 40025. [2020-10-12 20:08:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40025 states. [2020-10-12 20:08:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40025 states to 40025 states and 59672 transitions. [2020-10-12 20:08:41,826 INFO L78 Accepts]: Start accepts. Automaton has 40025 states and 59672 transitions. Word has length 73 [2020-10-12 20:08:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:41,826 INFO L479 AbstractCegarLoop]: Abstraction has 40025 states and 59672 transitions. [2020-10-12 20:08:41,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:08:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40025 states and 59672 transitions. [2020-10-12 20:08:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 20:08:41,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:41,847 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 20:08:41,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:08:41,848 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1194756846, now seen corresponding path program 1 times [2020-10-12 20:08:41,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:41,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188095408] [2020-10-12 20:08:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:41,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:41,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:42,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:46,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:46,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 20:08:46,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:08:46,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 20:08:46,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:46,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:08:46,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 20:08:46,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 20:08:46,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:47,157 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:08:47,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:08:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:47,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:08:47,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:08:47,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:08:47,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:08:47,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:08:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:08:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:08:47,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:08:47,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:08:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:08:47,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188095408] [2020-10-12 20:08:47,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:08:47,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:08:47,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138965569] [2020-10-12 20:08:47,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:08:47,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:08:47,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:08:47,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:47,281 INFO L87 Difference]: Start difference. First operand 40025 states and 59672 transitions. Second operand 8 states. [2020-10-12 20:08:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:08:51,751 INFO L93 Difference]: Finished difference Result 102793 states and 153108 transitions. [2020-10-12 20:08:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:08:51,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-10-12 20:08:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:08:51,908 INFO L225 Difference]: With dead ends: 102793 [2020-10-12 20:08:51,908 INFO L226 Difference]: Without dead ends: 66567 [2020-10-12 20:08:51,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:08:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66567 states. [2020-10-12 20:08:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66567 to 66559. [2020-10-12 20:08:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66559 states. [2020-10-12 20:08:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66559 states to 66559 states and 97695 transitions. [2020-10-12 20:08:56,599 INFO L78 Accepts]: Start accepts. Automaton has 66559 states and 97695 transitions. Word has length 98 [2020-10-12 20:08:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:08:56,600 INFO L479 AbstractCegarLoop]: Abstraction has 66559 states and 97695 transitions. [2020-10-12 20:08:56,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:08:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 66559 states and 97695 transitions. [2020-10-12 20:08:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 20:08:56,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:08:56,629 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 20:08:56,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:08:56,629 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:08:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:08:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1923087750, now seen corresponding path program 1 times [2020-10-12 20:08:56,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:08:56,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970218034] [2020-10-12 20:08:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:08:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:08:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:56,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:57,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:57,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:08:58,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:01,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:01,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 20:09:01,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:09:01,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:09:01,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:09:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:09:01,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 20:09:01,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:02,006 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:09:02,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:09:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:09:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:09:02,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:09:02,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:09:02,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:09:02,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 20:09:02,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:09:02,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:09:02,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:09:02,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:09:02,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:09:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:09:02,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970218034] [2020-10-12 20:09:02,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:09:02,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 20:09:02,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624495501] [2020-10-12 20:09:02,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:09:02,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:09:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:09:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:09:02,087 INFO L87 Difference]: Start difference. First operand 66559 states and 97695 transitions. Second operand 12 states. [2020-10-12 20:09:02,285 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-12 20:09:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:09:59,583 INFO L93 Difference]: Finished difference Result 874429 states and 1281330 transitions. [2020-10-12 20:09:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 20:09:59,583 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 98 [2020-10-12 20:09:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:10:00,940 INFO L225 Difference]: With dead ends: 874429 [2020-10-12 20:10:00,941 INFO L226 Difference]: Without dead ends: 807921 [2020-10-12 20:10:01,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=3580, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 20:10:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807921 states. [2020-10-12 20:10:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807921 to 510339. [2020-10-12 20:10:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510339 states. [2020-10-12 20:10:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510339 states to 510339 states and 744888 transitions. [2020-10-12 20:10:47,517 INFO L78 Accepts]: Start accepts. Automaton has 510339 states and 744888 transitions. Word has length 98 [2020-10-12 20:10:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:10:47,518 INFO L479 AbstractCegarLoop]: Abstraction has 510339 states and 744888 transitions. [2020-10-12 20:10:47,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:10:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 510339 states and 744888 transitions. [2020-10-12 20:10:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 20:10:47,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:10:47,577 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 20:10:47,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:10:47,578 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:10:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:10:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash 893428697, now seen corresponding path program 1 times [2020-10-12 20:10:47,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:10:47,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352595212] [2020-10-12 20:10:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:10:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:47,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:47,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:48,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:48,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:50,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:52,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:52,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 20:10:52,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:10:52,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 20:10:52,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:52,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:10:52,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 20:10:52,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 20:10:52,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:52,815 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 20:10:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:10:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:10:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:10:52,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:10:52,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:10:52,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:10:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:10:52,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:10:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:10:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:10:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:10:52,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:10:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:10:52,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352595212] [2020-10-12 20:10:52,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:10:52,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:10:52,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839512989] [2020-10-12 20:10:52,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:10:52,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:10:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:10:52,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:10:52,855 INFO L87 Difference]: Start difference. First operand 510339 states and 744888 transitions. Second operand 9 states. [2020-10-12 20:10:53,035 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 143