/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.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:03:53,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:03:53,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:03:53,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:03:53,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:03:53,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:03:53,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:03:53,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:03:53,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:03:53,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:03:53,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:03:53,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:03:53,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:03:53,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:03:53,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:03:53,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:03:53,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:03:53,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:03:53,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:03:53,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:03:53,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:03:53,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:03:53,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:03:53,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:03:53,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:03:53,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:03:53,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:03:53,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:03:53,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:03:53,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:03:53,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:03:53,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:03:53,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:03:53,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:03:53,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:03:53,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:03:53,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:03:53,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:03:53,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:03:53,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:03:53,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:03:53,499 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 20:03:53,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:03:53,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:03:53,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:03:53,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:03:53,540 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:03:53,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:03:53,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:03:53,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:03:53,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:03:53,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:03:53,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:03:53,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:03:53,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:03:53,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:03:53,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:03:53,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:03:53,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:03:53,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:03:53,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:03:53,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:03:53,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:03:53,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:03:53,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:03:53,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:03:53,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:03:53,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:03:53,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:03:53,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:03:53,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:03:53,547 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 20:03:53,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:03:53,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:03:53,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:03:53,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:03:53,888 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:03:53,889 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:03:53,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e703fd95/ffd4de95a1224f5ba83789299e408018/FLAGb3fdffa4c [2020-10-12 20:03:54,473 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:03:54,474 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:03:54,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e703fd95/ffd4de95a1224f5ba83789299e408018/FLAGb3fdffa4c [2020-10-12 20:03:54,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e703fd95/ffd4de95a1224f5ba83789299e408018 [2020-10-12 20:03:54,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:03:54,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:03:54,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:03:54,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:03:54,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:03:54,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:03:54" (1/1) ... [2020-10-12 20:03:54,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a428c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:54, skipping insertion in model container [2020-10-12 20:03:54,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:03:54" (1/1) ... [2020-10-12 20:03:54,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:03:54,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:03:55,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:03:55,227 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:03:55,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:03:55,337 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:03:55,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55 WrapperNode [2020-10-12 20:03:55,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:03:55,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:03:55,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:03:55,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:03:55,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (1/1) ... [2020-10-12 20:03:55,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:03:55,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:03:55,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:03:55,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:03:55,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (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 20:03:55,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:03:55,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:03:55,460 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:03:55,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:03:55,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:03:55,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:03:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:03:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:03:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:03:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:03:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:03:55,461 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:03:55,462 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:03:55,462 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:03:55,462 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:03:55,462 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:03:55,462 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:03:55,462 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:03:55,463 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:03:55,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:03:55,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:03:55,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:03:56,087 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:03:56,088 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:03:56,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:03:56 BoogieIcfgContainer [2020-10-12 20:03:56,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:03:56,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:03:56,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:03:56,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:03:56,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:03:54" (1/3) ... [2020-10-12 20:03:56,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636351b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:03:56, skipping insertion in model container [2020-10-12 20:03:56,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:55" (2/3) ... [2020-10-12 20:03:56,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636351b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:03:56, skipping insertion in model container [2020-10-12 20:03:56,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:03:56" (3/3) ... [2020-10-12 20:03:56,105 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:03:56,117 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:03:56,127 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:03:56,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:03:56,172 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:03:56,172 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:03:56,172 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:03:56,172 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:03:56,173 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:03:56,173 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:03:56,173 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:03:56,174 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:03:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states. [2020-10-12 20:03:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 20:03:56,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:56,210 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] [2020-10-12 20:03:56,211 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash 755670559, now seen corresponding path program 1 times [2020-10-12 20:03:56,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:56,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725629267] [2020-10-12 20:03:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:56,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:56,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:56,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:57,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:58,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:58,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 20:03:58,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:03:58,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1901 [2020-10-12 20:03:58,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:58,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:03:58,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:03:58,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 20:03:58,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 20:03:58,628 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:03:58,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:58,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:58,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:58,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:58,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:03:58,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:58,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:58,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:58,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:58,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:58,682 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 20:03:58,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725629267] [2020-10-12 20:03:58,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:58,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:03:58,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168511134] [2020-10-12 20:03:58,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:03:58,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:58,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:03:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:03:58,714 INFO L87 Difference]: Start difference. First operand 117 states. Second operand 7 states. [2020-10-12 20:03:59,101 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-12 20:04:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:00,026 INFO L93 Difference]: Finished difference Result 547 states and 860 transitions. [2020-10-12 20:04:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:04:00,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-12 20:04:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:00,048 INFO L225 Difference]: With dead ends: 547 [2020-10-12 20:04:00,048 INFO L226 Difference]: Without dead ends: 441 [2020-10-12 20:04:00,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:04:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-12 20:04:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 193. [2020-10-12 20:04:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 20:04:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 288 transitions. [2020-10-12 20:04:00,130 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 288 transitions. Word has length 53 [2020-10-12 20:04:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:00,131 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 288 transitions. [2020-10-12 20:04:00,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:04:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 288 transitions. [2020-10-12 20:04:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 20:04:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:00,135 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] [2020-10-12 20:04:00,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:04:00,138 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1932418099, now seen corresponding path program 1 times [2020-10-12 20:04:00,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:00,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274950737] [2020-10-12 20:04:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:00,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:00,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:00,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:00,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:01,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:01,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 20:04:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:04:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1211 [2020-10-12 20:04:01,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:04:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-12 20:04:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:04:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:01,713 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:01,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:01,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:01,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:01,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:01,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:01,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:04:01,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:04:01,769 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 20:04:01,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274950737] [2020-10-12 20:04:01,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:01,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:04:01,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476468035] [2020-10-12 20:04:01,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:04:01,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:04:01,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:04:01,775 INFO L87 Difference]: Start difference. First operand 193 states and 288 transitions. Second operand 5 states. [2020-10-12 20:04:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:02,646 INFO L93 Difference]: Finished difference Result 359 states and 549 transitions. [2020-10-12 20:04:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:04:02,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-10-12 20:04:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:02,652 INFO L225 Difference]: With dead ends: 359 [2020-10-12 20:04:02,653 INFO L226 Difference]: Without dead ends: 357 [2020-10-12 20:04:02,655 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 20:04:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-12 20:04:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 197. [2020-10-12 20:04:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-12 20:04:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 292 transitions. [2020-10-12 20:04:02,675 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 292 transitions. Word has length 54 [2020-10-12 20:04:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:02,675 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 292 transitions. [2020-10-12 20:04:02,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:04:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 292 transitions. [2020-10-12 20:04:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 20:04:02,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:02,678 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] [2020-10-12 20:04:02,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:04:02,679 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:02,679 INFO L82 PathProgramCache]: Analyzing trace with hash -214961330, now seen corresponding path program 1 times [2020-10-12 20:04:02,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:02,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428885525] [2020-10-12 20:04:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:02,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:03,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:03,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:03,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 20:04:03,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:04:03,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 692 [2020-10-12 20:04:03,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:04:03,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 20:04:03,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:03,574 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:03,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:03,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:03,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:03,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:03,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 20:04:03,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:03,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:03,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:03,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:03,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:03,621 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 20:04:03,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428885525] [2020-10-12 20:04:03,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:03,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:04:03,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833799729] [2020-10-12 20:04:03,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:04:03,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:04:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:04:03,624 INFO L87 Difference]: Start difference. First operand 197 states and 292 transitions. Second operand 4 states. [2020-10-12 20:04:03,776 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:04:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:04,278 INFO L93 Difference]: Finished difference Result 515 states and 790 transitions. [2020-10-12 20:04:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:04:04,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-12 20:04:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:04,282 INFO L225 Difference]: With dead ends: 515 [2020-10-12 20:04:04,282 INFO L226 Difference]: Without dead ends: 349 [2020-10-12 20:04:04,284 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 20:04:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-12 20:04:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2020-10-12 20:04:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-12 20:04:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 522 transitions. [2020-10-12 20:04:04,315 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 522 transitions. Word has length 55 [2020-10-12 20:04:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:04,316 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 522 transitions. [2020-10-12 20:04:04,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:04:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 522 transitions. [2020-10-12 20:04:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 20:04:04,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:04,320 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] [2020-10-12 20:04:04,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:04:04,320 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1516777453, now seen corresponding path program 1 times [2020-10-12 20:04:04,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:04,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548939592] [2020-10-12 20:04:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:04,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:05,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:06,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:06,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 20:04:06,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:04:06,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-12 20:04:06,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:04:06,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:04:06,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 20:04:06,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:06,361 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:06,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:06,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:06,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:06,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:06,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:04:06,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:06,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:06,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:06,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:06,391 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 20:04:06,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548939592] [2020-10-12 20:04:06,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:06,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:04:06,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584685313] [2020-10-12 20:04:06,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:04:06,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:04:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:04:06,394 INFO L87 Difference]: Start difference. First operand 345 states and 522 transitions. Second operand 5 states. [2020-10-12 20:04:06,582 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:07,393 INFO L93 Difference]: Finished difference Result 677 states and 1041 transitions. [2020-10-12 20:04:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:04:07,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-12 20:04:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:07,397 INFO L225 Difference]: With dead ends: 677 [2020-10-12 20:04:07,397 INFO L226 Difference]: Without dead ends: 511 [2020-10-12 20:04:07,399 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 20:04:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-10-12 20:04:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 505. [2020-10-12 20:04:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-10-12 20:04:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 772 transitions. [2020-10-12 20:04:07,439 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 772 transitions. Word has length 56 [2020-10-12 20:04:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:07,440 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 772 transitions. [2020-10-12 20:04:07,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:04:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 772 transitions. [2020-10-12 20:04:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 20:04:07,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:07,443 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] [2020-10-12 20:04:07,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:04:07,443 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash 899516515, now seen corresponding path program 1 times [2020-10-12 20:04:07,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:07,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352407865] [2020-10-12 20:04:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:07,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:07,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:07,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:08,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:10,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:10,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 20:04:10,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:04:10,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3190 [2020-10-12 20:04:10,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:04:10,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:04:10,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 20:04:10,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:10,836 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:10,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:10,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:10,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:10,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:04:10,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:10,862 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 20:04:10,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352407865] [2020-10-12 20:04:10,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:10,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:04:10,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290189726] [2020-10-12 20:04:10,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:04:10,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:10,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:04:10,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:04:10,864 INFO L87 Difference]: Start difference. First operand 505 states and 772 transitions. Second operand 7 states. [2020-10-12 20:04:11,061 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:12,150 INFO L93 Difference]: Finished difference Result 2115 states and 3306 transitions. [2020-10-12 20:04:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 20:04:12,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 20:04:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:12,161 INFO L225 Difference]: With dead ends: 2115 [2020-10-12 20:04:12,161 INFO L226 Difference]: Without dead ends: 1875 [2020-10-12 20:04:12,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 20:04:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2020-10-12 20:04:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 963. [2020-10-12 20:04:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2020-10-12 20:04:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1492 transitions. [2020-10-12 20:04:12,242 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1492 transitions. Word has length 56 [2020-10-12 20:04:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:12,243 INFO L479 AbstractCegarLoop]: Abstraction has 963 states and 1492 transitions. [2020-10-12 20:04:12,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:04:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1492 transitions. [2020-10-12 20:04:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 20:04:12,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:12,245 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] [2020-10-12 20:04:12,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:04:12,245 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:12,246 INFO L82 PathProgramCache]: Analyzing trace with hash -578934334, now seen corresponding path program 1 times [2020-10-12 20:04:12,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:12,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922702239] [2020-10-12 20:04:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:12,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:12,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:12,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:14,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:14,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 20:04:14,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:04:14,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2396 [2020-10-12 20:04:14,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:04:14,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:14,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 20:04:14,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:14,878 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:14,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:14,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:14,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:14,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:14,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:14,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 20:04:14,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:14,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:14,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:14,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:14,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:04:14,954 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 20:04:14,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922702239] [2020-10-12 20:04:14,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:14,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:04:14,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528442907] [2020-10-12 20:04:14,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:04:14,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:14,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:04:14,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:04:14,959 INFO L87 Difference]: Start difference. First operand 963 states and 1492 transitions. Second operand 7 states. [2020-10-12 20:04:15,133 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 20:04:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:16,034 INFO L93 Difference]: Finished difference Result 3010 states and 4681 transitions. [2020-10-12 20:04:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:04:16,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 20:04:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:16,046 INFO L225 Difference]: With dead ends: 3010 [2020-10-12 20:04:16,046 INFO L226 Difference]: Without dead ends: 2078 [2020-10-12 20:04:16,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:04:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-10-12 20:04:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1055. [2020-10-12 20:04:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-10-12 20:04:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1633 transitions. [2020-10-12 20:04:16,147 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1633 transitions. Word has length 56 [2020-10-12 20:04:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:16,148 INFO L479 AbstractCegarLoop]: Abstraction has 1055 states and 1633 transitions. [2020-10-12 20:04:16,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:04:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1633 transitions. [2020-10-12 20:04:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 20:04:16,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:16,151 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] [2020-10-12 20:04:16,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:04:16,151 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1065770165, now seen corresponding path program 1 times [2020-10-12 20:04:16,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:16,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683276957] [2020-10-12 20:04:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:16,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:16,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:16,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:16,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:18,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:18,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 20:04:18,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:04:18,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1884 [2020-10-12 20:04:18,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:04:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:18,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 20:04:18,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:18,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:18,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:18,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:18,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:18,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:04:18,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:18,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:18,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:18,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:18,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:18,325 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 20:04:18,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683276957] [2020-10-12 20:04:18,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:18,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:04:18,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605745490] [2020-10-12 20:04:18,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:04:18,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:18,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:04:18,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:04:18,327 INFO L87 Difference]: Start difference. First operand 1055 states and 1633 transitions. Second operand 7 states. [2020-10-12 20:04:18,469 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:04:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:19,300 INFO L93 Difference]: Finished difference Result 2869 states and 4443 transitions. [2020-10-12 20:04:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:04:19,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 20:04:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:19,312 INFO L225 Difference]: With dead ends: 2869 [2020-10-12 20:04:19,312 INFO L226 Difference]: Without dead ends: 1937 [2020-10-12 20:04:19,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:04:19,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2020-10-12 20:04:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1130. [2020-10-12 20:04:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2020-10-12 20:04:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1743 transitions. [2020-10-12 20:04:19,477 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1743 transitions. Word has length 56 [2020-10-12 20:04:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:19,477 INFO L479 AbstractCegarLoop]: Abstraction has 1130 states and 1743 transitions. [2020-10-12 20:04:19,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:04:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1743 transitions. [2020-10-12 20:04:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 20:04:19,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:19,480 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] [2020-10-12 20:04:19,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:04:19,480 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash -356971409, now seen corresponding path program 1 times [2020-10-12 20:04:19,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:19,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945094151] [2020-10-12 20:04:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:19,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:19,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:19,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:24,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:24,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 20:04:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:04:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 20:04:24,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:04:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 20:04:24,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 20:04:24,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:04:24,714 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:24,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:24,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:24,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:24,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:24,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:24,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:04:24,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:24,745 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 20:04:24,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945094151] [2020-10-12 20:04:24,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:24,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:04:24,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149785268] [2020-10-12 20:04:24,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:04:24,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:04:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:04:24,753 INFO L87 Difference]: Start difference. First operand 1130 states and 1743 transitions. Second operand 7 states. [2020-10-12 20:04:24,931 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:25,859 INFO L93 Difference]: Finished difference Result 2806 states and 4365 transitions. [2020-10-12 20:04:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 20:04:25,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-12 20:04:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:25,874 INFO L225 Difference]: With dead ends: 2806 [2020-10-12 20:04:25,874 INFO L226 Difference]: Without dead ends: 2499 [2020-10-12 20:04:25,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 20:04:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2020-10-12 20:04:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1305. [2020-10-12 20:04:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-10-12 20:04:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2014 transitions. [2020-10-12 20:04:26,017 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2014 transitions. Word has length 57 [2020-10-12 20:04:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:26,017 INFO L479 AbstractCegarLoop]: Abstraction has 1305 states and 2014 transitions. [2020-10-12 20:04:26,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:04:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2014 transitions. [2020-10-12 20:04:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 20:04:26,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:26,019 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] [2020-10-12 20:04:26,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:04:26,020 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:26,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1554728941, now seen corresponding path program 1 times [2020-10-12 20:04:26,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:26,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531333380] [2020-10-12 20:04:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:26,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:31,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 20:04:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:04:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:04:31,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:04:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:04:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 20:04:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:31,215 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:31,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:31,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:31,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:31,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:31,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:04:31,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:31,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:31,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:31,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:31,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:04:31,251 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 20:04:31,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531333380] [2020-10-12 20:04:31,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:31,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:04:31,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14961042] [2020-10-12 20:04:31,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:04:31,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:04:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:04:31,254 INFO L87 Difference]: Start difference. First operand 1305 states and 2014 transitions. Second operand 8 states. [2020-10-12 20:04:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:33,022 INFO L93 Difference]: Finished difference Result 2607 states and 4013 transitions. [2020-10-12 20:04:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:04:33,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-12 20:04:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:33,035 INFO L225 Difference]: With dead ends: 2607 [2020-10-12 20:04:33,035 INFO L226 Difference]: Without dead ends: 2281 [2020-10-12 20:04:33,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:04:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2020-10-12 20:04:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1286. [2020-10-12 20:04:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1286 states. [2020-10-12 20:04:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1986 transitions. [2020-10-12 20:04:33,191 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1986 transitions. Word has length 60 [2020-10-12 20:04:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:33,191 INFO L479 AbstractCegarLoop]: Abstraction has 1286 states and 1986 transitions. [2020-10-12 20:04:33,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:04:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1986 transitions. [2020-10-12 20:04:33,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:04:33,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:33,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:33,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:04:33,199 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1088638692, now seen corresponding path program 1 times [2020-10-12 20:04:33,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:33,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873191605] [2020-10-12 20:04:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:33,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:36,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:38,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:38,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:04:38,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 20:04:38,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:04:38,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:38,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:04:38,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:38,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:04:38,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:38,463 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:38,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:38,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:38,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:38,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:38,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 20:04:38,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:38,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:38,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:04:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:38,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873191605] [2020-10-12 20:04:38,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:04:38,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:04:38,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314295660] [2020-10-12 20:04:38,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:04:38,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:04:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:04:38,529 INFO L87 Difference]: Start difference. First operand 1286 states and 1986 transitions. Second operand 8 states. [2020-10-12 20:04:38,752 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 20:04:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:40,251 INFO L93 Difference]: Finished difference Result 5715 states and 8864 transitions. [2020-10-12 20:04:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:04:40,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 20:04:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:40,278 INFO L225 Difference]: With dead ends: 5715 [2020-10-12 20:04:40,278 INFO L226 Difference]: Without dead ends: 5251 [2020-10-12 20:04:40,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 20:04:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2020-10-12 20:04:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 2625. [2020-10-12 20:04:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2625 states. [2020-10-12 20:04:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 4079 transitions. [2020-10-12 20:04:40,561 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 4079 transitions. Word has length 78 [2020-10-12 20:04:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:40,561 INFO L479 AbstractCegarLoop]: Abstraction has 2625 states and 4079 transitions. [2020-10-12 20:04:40,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:04:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 4079 transitions. [2020-10-12 20:04:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:04:40,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:40,566 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:40,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:04:40,566 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:40,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1575474523, now seen corresponding path program 1 times [2020-10-12 20:04:40,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:40,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548023791] [2020-10-12 20:04:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:40,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:40,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:43,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:43,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:45,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:45,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:04:45,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 20:04:45,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 20:04:45,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:04:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:45,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 20:04:45,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:45,851 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:45,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:45,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:45,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:45,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:45,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:04:45,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:04:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:45,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548023791] [2020-10-12 20:04:45,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:04:45,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 20:04:45,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383206480] [2020-10-12 20:04:45,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:04:45,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:04:45,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:04:45,928 INFO L87 Difference]: Start difference. First operand 2625 states and 4079 transitions. Second operand 8 states. [2020-10-12 20:04:46,127 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:04:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:47,883 INFO L93 Difference]: Finished difference Result 12313 states and 19003 transitions. [2020-10-12 20:04:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:04:47,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-12 20:04:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:47,932 INFO L225 Difference]: With dead ends: 12313 [2020-10-12 20:04:47,932 INFO L226 Difference]: Without dead ends: 9879 [2020-10-12 20:04:47,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:04:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9879 states. [2020-10-12 20:04:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9879 to 5097. [2020-10-12 20:04:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5097 states. [2020-10-12 20:04:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 7787 transitions. [2020-10-12 20:04:48,530 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 7787 transitions. Word has length 78 [2020-10-12 20:04:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:48,530 INFO L479 AbstractCegarLoop]: Abstraction has 5097 states and 7787 transitions. [2020-10-12 20:04:48,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:04:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 7787 transitions. [2020-10-12 20:04:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 20:04:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:48,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:48,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:04:48,541 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash 407025608, now seen corresponding path program 1 times [2020-10-12 20:04:48,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:48,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925772410] [2020-10-12 20:04:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:48,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:48,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:49,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:51,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:53,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:53,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 20:04:53,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:04:53,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:04:53,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:53,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:04:53,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:04:53,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:04:53,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:53,749 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:04:53,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:53,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:53,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:53,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:53,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:53,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:04:53,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:53,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:53,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:53,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:53,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:53,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925772410] [2020-10-12 20:04:53,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:04:53,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 20:04:53,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101374210] [2020-10-12 20:04:53,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:04:53,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:04:53,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:04:53,813 INFO L87 Difference]: Start difference. First operand 5097 states and 7787 transitions. Second operand 6 states. [2020-10-12 20:04:53,984 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 20:04:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:55,151 INFO L93 Difference]: Finished difference Result 8765 states and 13447 transitions. [2020-10-12 20:04:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:04:55,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-12 20:04:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:55,168 INFO L225 Difference]: With dead ends: 8765 [2020-10-12 20:04:55,168 INFO L226 Difference]: Without dead ends: 6919 [2020-10-12 20:04:55,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:04:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2020-10-12 20:04:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6893. [2020-10-12 20:04:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6893 states. [2020-10-12 20:04:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6893 states to 6893 states and 10531 transitions. [2020-10-12 20:04:55,796 INFO L78 Accepts]: Start accepts. Automaton has 6893 states and 10531 transitions. Word has length 79 [2020-10-12 20:04:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:55,796 INFO L479 AbstractCegarLoop]: Abstraction has 6893 states and 10531 transitions. [2020-10-12 20:04:55,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:04:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6893 states and 10531 transitions. [2020-10-12 20:04:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:04:55,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:55,804 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:55,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:04:55,805 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 562141846, now seen corresponding path program 1 times [2020-10-12 20:04:55,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:55,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317315754] [2020-10-12 20:04:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:55,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:55,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:55,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:55,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:56,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:56,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:00,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:00,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:00,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:05:00,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 20:05:00,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 20:05:00,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:05:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:05:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 20:05:00,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:01,080 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2020-10-12 20:05:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:01,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:01,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:01,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:01,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:05:01,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317315754] [2020-10-12 20:05:01,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:05:01,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 20:05:01,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652108231] [2020-10-12 20:05:01,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:05:01,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:05:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:05:01,271 INFO L87 Difference]: Start difference. First operand 6893 states and 10531 transitions. Second operand 12 states. [2020-10-12 20:05:01,419 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 20:05:08,374 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-10-12 20:05:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:15,234 INFO L93 Difference]: Finished difference Result 95785 states and 145399 transitions. [2020-10-12 20:05:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 20:05:15,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-12 20:05:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:15,425 INFO L225 Difference]: With dead ends: 95785 [2020-10-12 20:05:15,425 INFO L226 Difference]: Without dead ends: 88997 [2020-10-12 20:05:15,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=722, Invalid=2700, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 20:05:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88997 states. [2020-10-12 20:05:18,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88997 to 22985. [2020-10-12 20:05:18,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22985 states. [2020-10-12 20:05:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22985 states to 22985 states and 35014 transitions. [2020-10-12 20:05:18,397 INFO L78 Accepts]: Start accepts. Automaton has 22985 states and 35014 transitions. Word has length 81 [2020-10-12 20:05:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:18,397 INFO L479 AbstractCegarLoop]: Abstraction has 22985 states and 35014 transitions. [2020-10-12 20:05:18,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:05:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 22985 states and 35014 transitions. [2020-10-12 20:05:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:05:18,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:18,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:05:18,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:05:18,413 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash 246563872, now seen corresponding path program 1 times [2020-10-12 20:05:18,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:18,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11017895] [2020-10-12 20:05:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:18,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:18,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:18,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:18,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:19,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:19,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:19,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:23,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:23,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:05:23,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:05:23,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:05:23,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:05:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:05:23,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 20:05:23,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:23,758 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-12 20:05:23,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:23,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:23,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:23,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:23,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:05:23,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:23,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:23,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11017895] [2020-10-12 20:05:23,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:05:23,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 20:05:23,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004354167] [2020-10-12 20:05:23,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:05:23,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:05:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:05:23,791 INFO L87 Difference]: Start difference. First operand 22985 states and 35014 transitions. Second operand 10 states. [2020-10-12 20:05:23,939 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-12 20:05:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:47,836 INFO L93 Difference]: Finished difference Result 225191 states and 339244 transitions. [2020-10-12 20:05:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 20:05:47,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-12 20:05:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:48,328 INFO L225 Difference]: With dead ends: 225191 [2020-10-12 20:05:48,328 INFO L226 Difference]: Without dead ends: 202341 [2020-10-12 20:05:48,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 20:05:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202341 states. [2020-10-12 20:06:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202341 to 89667. [2020-10-12 20:06:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89667 states. [2020-10-12 20:06:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89667 states to 89667 states and 137394 transitions. [2020-10-12 20:06:00,957 INFO L78 Accepts]: Start accepts. Automaton has 89667 states and 137394 transitions. Word has length 81 [2020-10-12 20:06:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:00,957 INFO L479 AbstractCegarLoop]: Abstraction has 89667 states and 137394 transitions. [2020-10-12 20:06:00,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:06:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 89667 states and 137394 transitions. [2020-10-12 20:06:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:06:00,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:00,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:00,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:06:00,980 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2143177723, now seen corresponding path program 1 times [2020-10-12 20:06:00,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:00,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478971402] [2020-10-12 20:06:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:01,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:06,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 20:06:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:06,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:06,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:06,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:06,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:06,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:06,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:06:06,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:06,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:06,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478971402] [2020-10-12 20:06:06,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:06:06,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 20:06:06,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973686824] [2020-10-12 20:06:06,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:06:06,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:06,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:06:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:06:06,402 INFO L87 Difference]: Start difference. First operand 89667 states and 137394 transitions. Second operand 10 states. [2020-10-12 20:06:06,583 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-12 20:07:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:07:14,289 INFO L93 Difference]: Finished difference Result 626571 states and 956366 transitions. [2020-10-12 20:07:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 20:07:14,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-12 20:07:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:07:15,221 INFO L225 Difference]: With dead ends: 626571 [2020-10-12 20:07:15,221 INFO L226 Difference]: Without dead ends: 537039 [2020-10-12 20:07:15,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-10-12 20:07:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537039 states.