/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/array-industry-pattern/array_of_struct_break.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:16:52,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:16:52,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:16:52,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:16:52,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:16:52,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:16:52,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:16:52,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:16:52,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:16:52,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:16:52,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:16:52,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:16:52,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:16:52,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:16:52,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:16:52,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:16:52,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:16:52,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:16:52,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:16:52,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:16:52,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:16:52,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:16:52,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:16:52,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:16:52,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:16:52,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:16:52,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:16:52,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:16:52,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:16:52,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:16:52,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:16:52,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:16:52,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:16:52,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:16:52,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:16:52,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:16:52,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:16:52,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:16:52,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:16:52,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:16:52,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:16:52,436 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 [2020-10-14 18:16:52,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:16:52,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:16:52,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:16:52,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:16:52,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:16:52,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:16:52,488 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:16:52,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:16:52,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:16:52,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:16:52,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:16:52,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:16:52,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:16:52,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:16:52,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:16:52,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:16:52,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:16:52,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:16:52,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:16:52,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:16:52,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:16:52,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:16:52,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:16:52,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:16:52,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:16:52,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:16:52,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:16:52,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:16:52,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:16:52,495 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:16:52,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:16:52,848 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:16:52,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:16:52,856 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:16:52,857 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:16:52,858 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i [2020-10-14 18:16:52,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6f354dc6/f5fb66db554c44bd92c169d7866e4038/FLAG3ad95b769 [2020-10-14 18:16:53,348 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:16:53,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_break.i [2020-10-14 18:16:53,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6f354dc6/f5fb66db554c44bd92c169d7866e4038/FLAG3ad95b769 [2020-10-14 18:16:53,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6f354dc6/f5fb66db554c44bd92c169d7866e4038 [2020-10-14 18:16:53,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:16:53,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:16:53,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:16:53,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:16:53,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:16:53,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:16:53" (1/1) ... [2020-10-14 18:16:53,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc3fb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:53, skipping insertion in model container [2020-10-14 18:16:53,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:16:53" (1/1) ... [2020-10-14 18:16:53,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:16:53,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:16:53,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:16:55,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:16:55,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:16:55,675 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:16:55,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55 WrapperNode [2020-10-14 18:16:55,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:16:55,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:16:55,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:16:55,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:16:55,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (1/1) ... [2020-10-14 18:16:55,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:16:55,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:16:55,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:16:55,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:16:55,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (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 [2020-10-14 18:16:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:16:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:16:55,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:16:55,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:16:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:16:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:16:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:16:55,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:16:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:16:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:16:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:16:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:16:55,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:16:55,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:16:56,074 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:16:56,075 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:16:56,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:16:56 BoogieIcfgContainer [2020-10-14 18:16:56,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:16:56,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:16:56,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:16:56,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:16:56,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:16:53" (1/3) ... [2020-10-14 18:16:56,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f8699c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:16:56, skipping insertion in model container [2020-10-14 18:16:56,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:16:55" (2/3) ... [2020-10-14 18:16:56,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f8699c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:16:56, skipping insertion in model container [2020-10-14 18:16:56,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:16:56" (3/3) ... [2020-10-14 18:16:56,101 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_break.i [2020-10-14 18:16:56,112 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:16:56,119 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:16:56,132 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:16:56,157 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:16:56,157 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:16:56,157 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:16:56,157 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:16:56,157 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:16:56,158 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:16:56,158 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:16:56,158 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:16:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-14 18:16:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 18:16:56,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:56,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:56,185 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2020-10-14 18:16:56,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:56,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258674539] [2020-10-14 18:16:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:56,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:56,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:56,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 18:16:56,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:56,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-14 18:16:56,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:56,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:16:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:56,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:16:56,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:56,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:56,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:56,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:56,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 18:16:56,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:56,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:56,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258674539] [2020-10-14 18:16:56,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:16:56,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 18:16:56,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39419746] [2020-10-14 18:16:56,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 18:16:56,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:56,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 18:16:56,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:16:56,538 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-14 18:16:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:56,667 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-14 18:16:56,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 18:16:56,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 18:16:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:56,678 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:16:56,679 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 18:16:56,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:16:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 18:16:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-14 18:16:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 18:16:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-14 18:16:56,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-14 18:16:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:56,727 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-14 18:16:56,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 18:16:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-14 18:16:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 18:16:56,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:56,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:56,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:16:56,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2020-10-14 18:16:56,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:56,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100273094] [2020-10-14 18:16:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:56,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:56,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 18:16:56,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:56,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 18:16:56,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:56,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:56,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:16:56,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:16:56,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:16:56,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:56,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:56,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:57,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:16:57,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:57,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:57,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:57,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:57,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100273094] [2020-10-14 18:16:57,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:16:57,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 18:16:57,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820543489] [2020-10-14 18:16:57,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:16:57,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:16:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:16:57,014 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-14 18:16:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:57,171 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-14 18:16:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:16:57,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 18:16:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:57,173 INFO L225 Difference]: With dead ends: 52 [2020-10-14 18:16:57,173 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:16:57,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:16:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:16:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2020-10-14 18:16:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 18:16:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 18:16:57,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-14 18:16:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:57,194 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 18:16:57,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:16:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 18:16:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 18:16:57,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:57,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:57,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:16:57,197 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash -796107231, now seen corresponding path program 1 times [2020-10-14 18:16:57,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:57,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9648634] [2020-10-14 18:16:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:16:57,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 18:16:57,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:16:57,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:16:57,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 18:16:57,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:57,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:16:57,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:57,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:57,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9648634] [2020-10-14 18:16:57,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:16:57,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 18:16:57,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788651276] [2020-10-14 18:16:57,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:16:57,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:16:57,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:16:57,383 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-14 18:16:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:57,467 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-14 18:16:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:16:57,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 18:16:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:57,469 INFO L225 Difference]: With dead ends: 42 [2020-10-14 18:16:57,469 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 18:16:57,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:16:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 18:16:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-14 18:16:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 18:16:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-14 18:16:57,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-10-14 18:16:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:57,476 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-14 18:16:57,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:16:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-14 18:16:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:16:57,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:57,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:57,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:16:57,478 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2000433480, now seen corresponding path program 1 times [2020-10-14 18:16:57,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:57,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87798486] [2020-10-14 18:16:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:16:57,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:16:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-14 18:16:57,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:16:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:16:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 18:16:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:57,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:57,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:57,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:57,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:16:57,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:57,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:57,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:57,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:57,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87798486] [2020-10-14 18:16:57,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:57,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:16:57,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051985683] [2020-10-14 18:16:57,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:16:57,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:16:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:16:57,919 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-14 18:16:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:58,226 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-14 18:16:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:16:58,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-14 18:16:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:58,228 INFO L225 Difference]: With dead ends: 35 [2020-10-14 18:16:58,228 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 18:16:58,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:16:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 18:16:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-14 18:16:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:16:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-14 18:16:58,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-10-14 18:16:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:58,236 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-14 18:16:58,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:16:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-14 18:16:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 18:16:58,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:58,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:58,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:16:58,238 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1889472975, now seen corresponding path program 1 times [2020-10-14 18:16:58,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:58,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391392309] [2020-10-14 18:16:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:58,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:58,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:16:58,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:16:58,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-14 18:16:58,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:58,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:16:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:16:58,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:16:58,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:58,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:58,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:58,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:58,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:58,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:16:58,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:58,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:16:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:16:58,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:58,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-14 18:16:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:58,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:58,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:58,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:58,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 18:16:58,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:58,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:16:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:58,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:16:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:16:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:58,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391392309] [2020-10-14 18:16:58,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:58,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:16:58,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691311808] [2020-10-14 18:16:58,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:16:58,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:16:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:16:58,975 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-10-14 18:16:59,424 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-10-14 18:16:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:16:59,782 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-14 18:16:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:16:59,782 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 18:16:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:16:59,785 INFO L225 Difference]: With dead ends: 55 [2020-10-14 18:16:59,785 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 18:16:59,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:16:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 18:16:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-14 18:16:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 18:16:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-14 18:16:59,794 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-10-14 18:16:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:16:59,794 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-14 18:16:59,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:16:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-14 18:16:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:16:59,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:16:59,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:16:59,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:16:59,796 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:16:59,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:16:59,797 INFO L82 PathProgramCache]: Analyzing trace with hash 796210348, now seen corresponding path program 2 times [2020-10-14 18:16:59,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:16:59,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118489931] [2020-10-14 18:16:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:16:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:00,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:17:00,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:17:00,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-14 18:17:00,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:00,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:17:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:17:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:17:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:00,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:00,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:00,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:00,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:00,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:17:00,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:00,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:17:00,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 18:17:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:00,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:00,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:00,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:00,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:00,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:17:00,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:00,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:00,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:00,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:00,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:17:00,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118489931] [2020-10-14 18:17:00,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:00,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:17:00,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479444229] [2020-10-14 18:17:00,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:17:00,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:00,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:17:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:17:00,642 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2020-10-14 18:17:01,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:01,139 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-10-14 18:17:01,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:17:01,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-14 18:17:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:01,141 INFO L225 Difference]: With dead ends: 47 [2020-10-14 18:17:01,141 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 18:17:01,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:17:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 18:17:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-14 18:17:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:17:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-14 18:17:01,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 29 [2020-10-14 18:17:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:01,156 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-14 18:17:01,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:17:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-14 18:17:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:17:01,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:01,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:01,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:17:01,159 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1347124045, now seen corresponding path program 3 times [2020-10-14 18:17:01,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:01,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092404215] [2020-10-14 18:17:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:02,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:02,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:03,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:03,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 18:17:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:17:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-14 18:17:03,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:03,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:17:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:17:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:04,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:04,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:04,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:04,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:04,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:17:04,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:04,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:04,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:04,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:04,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:04,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:04,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 18:17:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:04,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:04,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:04,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:04,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:04,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:17:04,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:04,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:04,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:17:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:17:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:04,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 18:17:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:04,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:04,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:04,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:04,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:04,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:17:04,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:04,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:04,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:17:04,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092404215] [2020-10-14 18:17:04,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:04,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:17:04,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458639260] [2020-10-14 18:17:04,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:17:04,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:17:04,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:17:04,351 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-14 18:17:04,634 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-14 18:17:04,816 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-14 18:17:05,065 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-14 18:17:05,585 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-14 18:17:05,955 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-14 18:17:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:06,168 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-14 18:17:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:17:06,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-14 18:17:06,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:06,170 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:17:06,170 INFO L226 Difference]: Without dead ends: 45 [2020-10-14 18:17:06,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:17:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-14 18:17:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-14 18:17:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:17:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-14 18:17:06,180 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2020-10-14 18:17:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:06,181 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-14 18:17:06,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:17:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-14 18:17:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:17:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:06,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:06,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:17:06,183 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash -551886520, now seen corresponding path program 4 times [2020-10-14 18:17:06,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:06,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700927928] [2020-10-14 18:17:06,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:06,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:06,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:07,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:17:09,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:17:09,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3325 [2020-10-14 18:17:09,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:17:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:17:09,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:17:09,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:09,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:09,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:17:09,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:09,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:17:09,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:09,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 18:17:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:09,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:09,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:09,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:09,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:09,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:09,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 18:17:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:09,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:09,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:09,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:09,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:09,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:09,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:09,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:09,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:09,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:09,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:09,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:17:09,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700927928] [2020-10-14 18:17:09,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:09,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:17:09,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583776717] [2020-10-14 18:17:09,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:17:09,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:17:09,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:17:09,689 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 13 states. [2020-10-14 18:17:10,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:10,124 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-14 18:17:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:17:10,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-14 18:17:10,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:10,126 INFO L225 Difference]: With dead ends: 59 [2020-10-14 18:17:10,126 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 18:17:10,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:17:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 18:17:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-14 18:17:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:17:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-14 18:17:10,147 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 41 [2020-10-14 18:17:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:10,147 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-14 18:17:10,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:17:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-14 18:17:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 18:17:10,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:10,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:10,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:17:10,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1626849743, now seen corresponding path program 5 times [2020-10-14 18:17:10,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:10,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313984883] [2020-10-14 18:17:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:10,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:10,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:11,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:15,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:15,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:17:15,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:17:15,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:17:15,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:15,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:15,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:17:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:15,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:17:15,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:16,014 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-14 18:17:16,256 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-14 18:17:16,610 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-14 18:17:17,475 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-14 18:17:17,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:17,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:17,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:17,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 18:17:17,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:17,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:17,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:17,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:17,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:17,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 18:17:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:17,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:17,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:17,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 18:17:17,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:17,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:17,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:17,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:17,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:17,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:17,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 18:17:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:17,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:17,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:17,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 18:17:17,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:17,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:17,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:17,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:17:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:17,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:17,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:17,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:17,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:17,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:17:17,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:17,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:17,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:17,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:17:17,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313984883] [2020-10-14 18:17:17,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:17,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:17:17,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220123432] [2020-10-14 18:17:17,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:17:17,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:17,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:17:17,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:17:17,804 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 17 states. [2020-10-14 18:17:18,533 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-14 18:17:18,948 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-14 18:17:19,468 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-14 18:17:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:20,381 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-14 18:17:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:17:20,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-10-14 18:17:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:20,382 INFO L225 Difference]: With dead ends: 94 [2020-10-14 18:17:20,382 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 18:17:20,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:17:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 18:17:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-14 18:17:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 18:17:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-14 18:17:20,399 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-10-14 18:17:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:20,400 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-14 18:17:20,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:17:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-14 18:17:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:17:20,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:20,403 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:20,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:17:20,403 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash -77626452, now seen corresponding path program 6 times [2020-10-14 18:17:20,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:20,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160600831] [2020-10-14 18:17:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:20,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:20,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:20,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:20,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:20,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:21,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:22,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:23,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:23,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:25,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:25,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:17:25,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:17:25,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:17:25,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:25,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:25,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:17:25,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:25,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:17:25,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:26,538 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-14 18:17:26,908 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-14 18:17:27,528 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-14 18:17:28,055 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-10-14 18:17:28,524 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-14 18:17:29,774 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-14 18:17:29,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:29,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:29,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:29,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:29,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:17:29,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:29,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:29,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:29,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:29,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:29,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 18:17:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:29,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:29,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:29,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:29,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 18:17:29,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:29,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:29,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 18:17:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:29,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:30,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:30,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:30,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:30,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 18:17:30,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:30,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:30,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:30,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:30,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:30,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:30,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:17:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:30,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:30,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:30,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:30,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:17:30,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:30,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:30,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:30,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:17:30,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160600831] [2020-10-14 18:17:30,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:30,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:17:30,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996499138] [2020-10-14 18:17:30,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:17:30,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:17:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:17:30,147 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 19 states. [2020-10-14 18:17:31,558 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-14 18:17:32,429 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-14 18:17:33,452 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-14 18:17:33,917 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-14 18:17:34,444 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-14 18:17:34,847 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-14 18:17:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:17:35,300 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-14 18:17:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:17:35,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-14 18:17:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:17:35,302 INFO L225 Difference]: With dead ends: 97 [2020-10-14 18:17:35,302 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:17:35,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:17:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:17:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 18:17:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:17:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-14 18:17:35,315 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2020-10-14 18:17:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:17:35,315 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-14 18:17:35,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:17:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-14 18:17:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:17:35,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:17:35,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:17:35,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:17:35,318 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:17:35,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:17:35,319 INFO L82 PathProgramCache]: Analyzing trace with hash -885127087, now seen corresponding path program 7 times [2020-10-14 18:17:35,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:17:35,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700345288] [2020-10-14 18:17:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:17:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:35,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:35,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:36,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:37,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:37,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:38,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:38,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:38,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:39,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:40,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:40,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:17:40,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:17:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:17:40,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:40,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:17:40,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:17:40,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 18:17:40,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:42,643 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-14 18:17:42,895 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-14 18:17:43,403 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-14 18:17:44,084 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-14 18:17:44,895 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-14 18:17:46,565 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-14 18:17:48,951 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 92 [2020-10-14 18:17:50,495 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 92 [2020-10-14 18:17:52,150 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 95 [2020-10-14 18:17:56,063 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 99 [2020-10-14 18:17:59,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:17:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:59,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:17:59,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:59,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 18:17:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:59,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:59,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:59,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:59,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 18:17:59,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:59,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:59,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:59,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 18:17:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:59,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:59,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:59,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 18:17:59,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:59,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:17:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:17:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:59,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:17:59,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:17:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:17:59,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:17:59,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:17:59,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:17:59,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:17:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:17:59,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:17:59,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:17:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:17:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:17:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:17:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:17:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:17:59,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700345288] [2020-10-14 18:17:59,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:17:59,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:17:59,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45931382] [2020-10-14 18:17:59,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:17:59,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:17:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:17:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:17:59,496 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-10-14 18:17:59,819 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 28 [2020-10-14 18:18:00,216 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 26 [2020-10-14 18:18:00,515 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2020-10-14 18:18:05,195 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 113 DAG size of output: 108 [2020-10-14 18:18:10,117 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 18:18:11,389 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-14 18:18:13,067 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 18:18:17,186 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 145 DAG size of output: 130 [2020-10-14 18:18:20,245 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 149 DAG size of output: 134 [2020-10-14 18:18:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:18:20,828 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-14 18:18:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:18:20,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-10-14 18:18:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:18:20,831 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:18:20,831 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 18:18:20,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:18:20,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 18:18:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-14 18:18:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:18:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-14 18:18:20,843 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2020-10-14 18:18:20,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:18:20,843 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-14 18:18:20,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:18:20,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-14 18:18:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:18:20,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:18:20,845 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:18:20,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:18:20,845 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:18:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:18:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1024719476, now seen corresponding path program 8 times [2020-10-14 18:18:20,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:18:20,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149335283] [2020-10-14 18:18:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:18:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:18:20,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:20,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:20,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:21,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:21,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:21,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:22,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:22,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:24,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:25,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:18:25,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:18:25,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:18:25,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:18:25,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:18:25,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:18:25,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:18:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:18:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:18:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:18:25,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:18:29,932 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-14 18:18:30,331 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-14 18:18:30,897 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-14 18:18:31,748 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-14 18:18:33,201 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-14 18:18:35,526 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-10-14 18:18:39,627 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 78 [2020-10-14 18:18:45,913 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 180 DAG size of output: 87 [2020-10-14 18:18:48,218 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 145 DAG size of output: 80 [2020-10-14 18:18:51,441 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 147 DAG size of output: 82 [2020-10-14 18:19:00,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:19:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:00,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:00,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:00,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:19:00,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:19:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 18:19:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:00,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:00,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:19:00,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:19:00,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:19:00,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:00,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:19:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:00,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:00,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:00,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:00,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:00,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:00,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:19:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 18:19:00,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:19:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:00,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:19:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:00,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:00,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:00,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:19:00,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:19:00,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:19:00,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:00,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:19:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:19:00,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:19:00,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:19:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:19:00,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149335283] [2020-10-14 18:19:00,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:19:00,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:19:00,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502762547] [2020-10-14 18:19:00,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:19:00,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:19:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:19:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=338, Unknown=1, NotChecked=0, Total=462 [2020-10-14 18:19:00,473 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2020-10-14 18:19:00,756 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 28 [2020-10-14 18:19:25,665 WARN L193 SmtUtils]: Spent 11.38 s on a formula simplification. DAG size of input: 152 DAG size of output: 78 [2020-10-14 18:19:29,671 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-14 18:19:43,826 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-14 18:19:45,278 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-14 18:19:49,064 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-14 18:19:52,224 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-14 18:19:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:19:54,834 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-14 18:19:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:19:54,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2020-10-14 18:19:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:19:54,839 INFO L225 Difference]: With dead ends: 103 [2020-10-14 18:19:54,840 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 18:19:54,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=245, Invalid=810, Unknown=1, NotChecked=0, Total=1056 [2020-10-14 18:19:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 18:19:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 18:19:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:19:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-14 18:19:54,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2020-10-14 18:19:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:19:54,852 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-14 18:19:54,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:19:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-14 18:19:54,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:19:54,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:19:54,854 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:19:54,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:19:54,854 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:19:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:19:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2093237647, now seen corresponding path program 9 times [2020-10-14 18:19:54,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:19:54,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357795671] [2020-10-14 18:19:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:19:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:19:54,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:54,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:55,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:56,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:56,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:56,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:56,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:59,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:59,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:19:59,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:19:59,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:19:59,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:19:59,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:19:59,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:19:59,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:19:59,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:19:59,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:19:59,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:19:59,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:00,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:00,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:00,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:00,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:00,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:00,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 18:20:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:00,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:00,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:20:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:00,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 18:20:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:00,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:00,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:00,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:20:00,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:20:00,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:00,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:20:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:20:00,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:00,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 18:20:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:20:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:00,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:20:00,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 79 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 18:20:00,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357795671] [2020-10-14 18:20:00,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:00,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:20:00,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877611600] [2020-10-14 18:20:00,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:20:00,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:20:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:20:00,423 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 15 states. [2020-10-14 18:20:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:02,397 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-10-14 18:20:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:20:02,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-10-14 18:20:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:02,404 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:20:02,404 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 18:20:02,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:20:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 18:20:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-14 18:20:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 18:20:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-14 18:20:02,433 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 62 [2020-10-14 18:20:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:02,434 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-14 18:20:02,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:20:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-14 18:20:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:20:02,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:02,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:02,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:20:02,436 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:02,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:02,436 INFO L82 PathProgramCache]: Analyzing trace with hash -7429336, now seen corresponding path program 10 times [2020-10-14 18:20:02,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:02,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332605767] [2020-10-14 18:20:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:02,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:03,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:06,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:06,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:06,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:06,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:07,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:07,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 18:20:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:45,731 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-14 18:20:46,203 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-10-14 18:20:47,250 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-14 18:20:48,870 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-14 18:20:51,689 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 124 DAG size of output: 76