/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s2lif.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:13:08,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:13:08,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:13:08,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:13:08,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:13:08,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:13:08,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:13:08,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:13:08,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:13:08,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:13:08,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:13:08,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:13:08,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:13:08,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:13:08,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:13:08,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:13:08,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:13:08,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:13:08,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:13:08,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:13:08,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:13:08,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:13:08,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:13:08,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:13:08,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:13:08,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:13:08,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:13:08,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:13:08,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:13:08,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:13:08,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:13:08,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:13:08,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:13:08,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:13:08,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:13:08,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:13:08,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:13:08,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:13:08,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:13:08,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:13:08,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:13:08,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:13:08,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:13:08,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:13:08,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:13:08,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:13:08,517 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:13:08,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:13:08,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:13:08,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:13:08,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:13:08,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:13:08,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:13:08,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:13:08,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:13:08,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:13:08,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:13:08,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:13:08,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:13:08,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:13:08,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:13:08,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:13:08,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:13:08,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:13:08,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:13:08,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:13:08,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:13:08,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:13:08,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:13:08,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:13:08,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:13:08,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:13:08,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:13:08,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:13:08,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:13:08,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:13:08,907 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:13:08,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-12 10:13:09,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a30568f0/aaa432354c7b4e04a8bec5e6901e1497/FLAG9dd838b1f [2020-10-12 10:13:09,537 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:13:09,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2lif.c [2020-10-12 10:13:09,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a30568f0/aaa432354c7b4e04a8bec5e6901e1497/FLAG9dd838b1f [2020-10-12 10:13:09,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a30568f0/aaa432354c7b4e04a8bec5e6901e1497 [2020-10-12 10:13:09,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:13:09,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:13:09,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:13:09,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:13:09,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:13:09,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:13:09" (1/1) ... [2020-10-12 10:13:09,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d7e22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:09, skipping insertion in model container [2020-10-12 10:13:09,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:13:09" (1/1) ... [2020-10-12 10:13:09,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:13:09,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:13:10,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:13:10,157 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:13:10,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:13:10,205 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:13:10,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10 WrapperNode [2020-10-12 10:13:10,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:13:10,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:13:10,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:13:10,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:13:10,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... [2020-10-12 10:13:10,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:13:10,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:13:10,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:13:10,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:13:10,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:13:10,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:13:10,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:13:10,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:13:10,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:13:10,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:13:10,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:13:10,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:13:10,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:13:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:13:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:13:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:13:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:13:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:13:10,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:13:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:13:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:13:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:13:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:13:10,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:13:10,709 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:13:10,709 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:13:10,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:13:10 BoogieIcfgContainer [2020-10-12 10:13:10,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:13:10,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:13:10,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:13:10,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:13:10,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:13:09" (1/3) ... [2020-10-12 10:13:10,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c2daf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:13:10, skipping insertion in model container [2020-10-12 10:13:10,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:13:10" (2/3) ... [2020-10-12 10:13:10,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c2daf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:13:10, skipping insertion in model container [2020-10-12 10:13:10,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:13:10" (3/3) ... [2020-10-12 10:13:10,724 INFO L109 eAbstractionObserver]: Analyzing ICFG s2lif.c [2020-10-12 10:13:10,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:13:10,744 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:13:10,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:13:10,807 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:13:10,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:13:10,807 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:13:10,808 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:13:10,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:13:10,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:13:10,808 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:13:10,808 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:13:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-12 10:13:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 10:13:10,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:10,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:10,839 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:10,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-10-12 10:13:10,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:10,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58880842] [2020-10-12 10:13:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:11,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:11,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:11,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 10:13:11,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:13:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-12 10:13:11,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:11,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 10:13:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:13:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:13:11,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:13:12,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:12,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:12,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:12,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:12,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:13:12,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:12,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:12,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:13:12,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:12,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:12,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:12,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:13:12,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:13:12,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:12,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:13:12,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:13:12,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:12,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58880842] [2020-10-12 10:13:12,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:13:12,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 10:13:12,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852414213] [2020-10-12 10:13:12,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 10:13:12,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:12,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 10:13:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 10:13:12,207 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 5 states. [2020-10-12 10:13:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:12,495 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-10-12 10:13:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:13:12,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-12 10:13:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:12,513 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:13:12,513 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 10:13:12,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:13:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 10:13:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 10:13:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 10:13:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-12 10:13:12,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-12 10:13:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:12,582 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-12 10:13:12,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 10:13:12,583 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-12 10:13:12,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:13:12,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:12,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:12,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:13:12,587 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-10-12 10:13:12,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:12,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688513395] [2020-10-12 10:13:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:12,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:12,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:15,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:15,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:13:15,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:13:15,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2611 [2020-10-12 10:13:15,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:13:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:15,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:13:15,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:15,626 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 10:13:16,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:16,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:16,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:16,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:16,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:13:16,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:16,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:16,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:16,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:16,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:16,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:16,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:16,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:16,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:16,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:16,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:16,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:16,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:16,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688513395] [2020-10-12 10:13:16,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:16,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:13:16,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313711046] [2020-10-12 10:13:16,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:13:16,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:16,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:13:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:16,062 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 17 states. [2020-10-12 10:13:16,731 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-12 10:13:17,147 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-12 10:13:17,298 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-12 10:13:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:18,069 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-10-12 10:13:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:13:18,070 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-12 10:13:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:18,074 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:13:18,074 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 10:13:18,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:13:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 10:13:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-12 10:13:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:13:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-12 10:13:18,090 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 30 [2020-10-12 10:13:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:18,090 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-12 10:13:18,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:13:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-12 10:13:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:13:18,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:18,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:18,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:13:18,093 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-10-12 10:13:18,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:18,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794933507] [2020-10-12 10:13:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:19,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:13:19,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:13:19,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-12 10:13:19,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:19,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:13:19,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:13:19,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:13:19,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:19,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:19,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:19,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:19,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:13:19,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:19,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:19,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:19,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:19,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:19,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:19,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:19,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:19,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:19,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:19,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:19,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:19,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:19,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:19,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794933507] [2020-10-12 10:13:19,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:19,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:13:19,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84252948] [2020-10-12 10:13:19,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:13:19,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:13:19,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:13:19,240 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 11 states. [2020-10-12 10:13:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:19,651 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-10-12 10:13:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:13:19,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 10:13:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:19,654 INFO L225 Difference]: With dead ends: 80 [2020-10-12 10:13:19,654 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 10:13:19,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 10:13:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-12 10:13:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:13:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-10-12 10:13:19,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 30 [2020-10-12 10:13:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:19,668 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-10-12 10:13:19,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:13:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-10-12 10:13:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:13:19,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:19,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:19,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:13:19,670 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash -231251771, now seen corresponding path program 2 times [2020-10-12 10:13:19,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:19,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905119642] [2020-10-12 10:13:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:19,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:20,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:13:20,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:13:20,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-12 10:13:20,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:13:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:20,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:13:20,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:20,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:20,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:20,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:20,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:20,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:20,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:20,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:20,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:20,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:20,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:20,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:20,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:20,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:13:20,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905119642] [2020-10-12 10:13:20,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:20,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:13:20,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718758816] [2020-10-12 10:13:20,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:13:20,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:13:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:13:20,285 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 8 states. [2020-10-12 10:13:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:20,492 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2020-10-12 10:13:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:13:20,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-12 10:13:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:20,493 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:13:20,494 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 10:13:20,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:13:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 10:13:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-10-12 10:13:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 10:13:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-12 10:13:20,504 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 32 [2020-10-12 10:13:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:20,504 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-12 10:13:20,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:13:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-12 10:13:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 10:13:20,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:20,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:20,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:13:20,507 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash 866319393, now seen corresponding path program 3 times [2020-10-12 10:13:20,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:20,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234356969] [2020-10-12 10:13:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:20,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:20,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:21,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:21,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 10:13:21,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:13:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-12 10:13:21,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:13:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:21,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:13:21,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:21,740 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 10:13:22,054 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-10-12 10:13:22,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:22,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:22,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:22,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:22,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:13:22,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:22,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:22,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:22,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:22,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:22,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:22,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:22,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:22,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:22,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:22,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:22,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:22,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:13:22,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234356969] [2020-10-12 10:13:22,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:22,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:13:22,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525682202] [2020-10-12 10:13:22,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:13:22,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:22,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:13:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:13:22,317 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 16 states. [2020-10-12 10:13:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:23,520 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-12 10:13:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:13:23,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-12 10:13:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:23,523 INFO L225 Difference]: With dead ends: 70 [2020-10-12 10:13:23,524 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 10:13:23,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:13:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 10:13:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-10-12 10:13:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 10:13:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-12 10:13:23,533 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 32 [2020-10-12 10:13:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:23,534 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-12 10:13:23,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:13:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-12 10:13:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:13:23,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:23,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:23,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:13:23,536 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:23,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1599778973, now seen corresponding path program 1 times [2020-10-12 10:13:23,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:23,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249170778] [2020-10-12 10:13:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:23,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:23,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:26,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:26,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:13:26,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:13:26,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2950 [2020-10-12 10:13:26,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:13:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:26,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:13:26,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:27,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:27,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:27,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:27,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:27,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:27,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:27,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:27,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:27,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:27,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:27,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:13:27,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249170778] [2020-10-12 10:13:27,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:27,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:13:27,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146439095] [2020-10-12 10:13:27,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:13:27,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:13:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:13:27,096 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 16 states. [2020-10-12 10:13:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:27,728 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-12 10:13:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:13:27,728 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-12 10:13:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:27,730 INFO L225 Difference]: With dead ends: 60 [2020-10-12 10:13:27,730 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 10:13:27,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:13:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 10:13:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-12 10:13:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:13:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-12 10:13:27,748 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 35 [2020-10-12 10:13:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:27,748 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-12 10:13:27,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:13:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-12 10:13:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:13:27,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:27,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:27,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:13:27,753 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:27,754 INFO L82 PathProgramCache]: Analyzing trace with hash -130866495, now seen corresponding path program 4 times [2020-10-12 10:13:27,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:27,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244640917] [2020-10-12 10:13:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:29,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:30,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:31,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:31,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:31,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:31,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:32,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:32,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:13:32,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:13:32,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4459 [2020-10-12 10:13:32,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:32,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:13:32,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:13:32,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:33,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:33,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:33,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:33,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:33,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:13:33,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:33,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:33,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:33,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:33,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:33,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:33,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:33,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:33,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:33,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:33,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:33,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:33,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:33,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244640917] [2020-10-12 10:13:33,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:33,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:13:33,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130176231] [2020-10-12 10:13:33,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:13:33,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:33,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:13:33,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:13:33,668 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 23 states. [2020-10-12 10:13:34,689 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-12 10:13:35,126 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-12 10:13:35,417 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-12 10:13:36,130 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-12 10:13:36,634 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 10:13:37,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:37,052 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2020-10-12 10:13:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:13:37,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2020-10-12 10:13:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:37,056 INFO L225 Difference]: With dead ends: 84 [2020-10-12 10:13:37,056 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 10:13:37,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:13:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 10:13:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-12 10:13:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:13:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-12 10:13:37,091 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 37 [2020-10-12 10:13:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:37,092 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-12 10:13:37,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:13:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-12 10:13:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:13:37,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:37,097 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:37,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:13:37,098 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983745, now seen corresponding path program 2 times [2020-10-12 10:13:37,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:37,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668959526] [2020-10-12 10:13:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:37,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:38,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:38,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:39,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:39,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:13:39,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:13:39,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2684 [2020-10-12 10:13:39,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:39,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:13:39,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:39,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:13:39,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:40,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:40,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:40,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:40,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:40,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:40,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:40,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:40,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:40,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:40,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:40,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:40,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:40,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:40,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:40,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:40,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:40,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:13:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:40,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668959526] [2020-10-12 10:13:40,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:40,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:13:40,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789530883] [2020-10-12 10:13:40,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:13:40,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:13:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:13:40,036 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 14 states. [2020-10-12 10:13:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:40,743 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-10-12 10:13:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:13:40,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-12 10:13:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:40,747 INFO L225 Difference]: With dead ends: 124 [2020-10-12 10:13:40,747 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:13:40,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:13:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:13:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 69. [2020-10-12 10:13:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 10:13:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-12 10:13:40,763 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 37 [2020-10-12 10:13:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:40,764 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-12 10:13:40,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:13:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-12 10:13:40,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:13:40,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:40,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:40,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:13:40,766 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1719214397, now seen corresponding path program 3 times [2020-10-12 10:13:40,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:40,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895034343] [2020-10-12 10:13:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:40,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:40,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:41,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:42,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:42,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:13:42,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:13:42,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-12 10:13:42,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:42,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:13:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:42,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:13:42,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:42,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:42,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:42,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:42,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:42,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:42,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:42,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:42,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:42,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:42,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:42,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:42,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:42,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:42,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:42,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:42,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895034343] [2020-10-12 10:13:42,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:42,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:13:42,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589820603] [2020-10-12 10:13:42,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:13:42,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:42,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:13:42,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:42,595 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 17 states. [2020-10-12 10:13:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:43,693 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2020-10-12 10:13:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:13:43,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-12 10:13:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:43,697 INFO L225 Difference]: With dead ends: 122 [2020-10-12 10:13:43,697 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 10:13:43,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:13:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 10:13:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 63. [2020-10-12 10:13:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 10:13:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-10-12 10:13:43,713 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 37 [2020-10-12 10:13:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:43,713 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-10-12 10:13:43,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:13:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-10-12 10:13:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:13:43,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:43,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:43,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:13:43,716 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:43,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:43,716 INFO L82 PathProgramCache]: Analyzing trace with hash 580388383, now seen corresponding path program 4 times [2020-10-12 10:13:43,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:43,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943168505] [2020-10-12 10:13:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:43,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:43,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:43,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:44,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:45,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:47,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:47,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:13:47,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:13:47,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3913 [2020-10-12 10:13:47,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:13:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:13:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:48,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:48,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:48,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:48,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:48,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:48,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:48,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:48,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:48,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:13:48,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943168505] [2020-10-12 10:13:48,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:48,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:13:48,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424642915] [2020-10-12 10:13:48,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:13:48,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:13:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:48,249 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 17 states. [2020-10-12 10:13:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:49,024 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-10-12 10:13:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:13:49,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 10:13:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:49,027 INFO L225 Difference]: With dead ends: 87 [2020-10-12 10:13:49,030 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 10:13:49,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:13:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 10:13:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-12 10:13:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 10:13:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-10-12 10:13:49,056 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2020-10-12 10:13:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:49,057 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-10-12 10:13:49,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:13:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-10-12 10:13:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:13:49,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:49,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:49,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:13:49,059 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2139934941, now seen corresponding path program 5 times [2020-10-12 10:13:49,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:49,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371907317] [2020-10-12 10:13:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 10:13:49,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:13:49,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:49,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:49,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:49,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:49,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:49,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:13:49,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:49,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:49,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:49,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:49,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:49,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:49,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:49,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:49,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:49,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:13:49,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371907317] [2020-10-12 10:13:49,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:49,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:13:49,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152419492] [2020-10-12 10:13:49,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:13:49,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:13:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:13:49,823 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 10 states. [2020-10-12 10:13:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:50,131 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-10-12 10:13:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:13:50,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-12 10:13:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:50,133 INFO L225 Difference]: With dead ends: 94 [2020-10-12 10:13:50,133 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 10:13:50,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:13:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 10:13:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-12 10:13:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 10:13:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-10-12 10:13:50,145 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 39 [2020-10-12 10:13:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:50,145 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-10-12 10:13:50,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:13:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-10-12 10:13:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:13:50,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:50,147 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:50,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:13:50,148 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:50,148 INFO L82 PathProgramCache]: Analyzing trace with hash 352759267, now seen corresponding path program 6 times [2020-10-12 10:13:50,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:50,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227533544] [2020-10-12 10:13:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:50,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:50,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:53,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:55,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:55,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:13:55,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:13:55,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-12 10:13:55,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:13:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:55,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:13:55,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:13:56,361 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-12 10:13:57,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:57,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:57,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:13:57,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:57,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:57,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:57,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:57,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:57,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:57,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227533544] [2020-10-12 10:13:57,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:57,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:13:57,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691724796] [2020-10-12 10:13:57,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:13:57,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:13:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:13:57,410 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 29 states. [2020-10-12 10:14:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:00,509 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-12 10:14:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:14:00,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-10-12 10:14:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:00,514 INFO L225 Difference]: With dead ends: 82 [2020-10-12 10:14:00,515 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 10:14:00,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:14:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 10:14:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2020-10-12 10:14:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:14:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-12 10:14:00,544 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 44 [2020-10-12 10:14:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:00,545 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-12 10:14:00,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:14:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-12 10:14:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:14:00,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:00,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:00,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:14:00,547 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash -668309087, now seen corresponding path program 5 times [2020-10-12 10:14:00,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:00,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69388431] [2020-10-12 10:14:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:00,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:00,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:01,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:03,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:04,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:05,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:05,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:14:05,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:06,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:06,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:06,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:06,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:06,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:06,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:06,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:06,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:06,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:06,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:06,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:06,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:06,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:06,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:06,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69388431] [2020-10-12 10:14:06,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:06,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:14:06,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94339542] [2020-10-12 10:14:06,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:14:06,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:14:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:14:06,142 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 18 states. [2020-10-12 10:14:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:08,105 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-10-12 10:14:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:14:08,106 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-12 10:14:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:08,107 INFO L225 Difference]: With dead ends: 109 [2020-10-12 10:14:08,107 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 10:14:08,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=454, Invalid=1802, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:14:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 10:14:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-12 10:14:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:14:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2020-10-12 10:14:08,138 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 44 [2020-10-12 10:14:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:08,141 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2020-10-12 10:14:08,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:14:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2020-10-12 10:14:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:14:08,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:08,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:08,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:14:08,145 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1336184475, now seen corresponding path program 6 times [2020-10-12 10:14:08,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:08,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103368684] [2020-10-12 10:14:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:08,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:08,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:08,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:08,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:08,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:09,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:09,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:12,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:12,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:13,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:13,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:14:13,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:14:13,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:14:13,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:14:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:13,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:14:13,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:13,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:13,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:13,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:13,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:13,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:13,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:13,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:13,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:13,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:13,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:13,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:13,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103368684] [2020-10-12 10:14:13,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:13,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:14:13,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698262750] [2020-10-12 10:14:13,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:14:13,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:14:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:14:13,855 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 21 states. [2020-10-12 10:14:15,283 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 10:14:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:17,464 INFO L93 Difference]: Finished difference Result 193 states and 238 transitions. [2020-10-12 10:14:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 10:14:17,465 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-12 10:14:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:17,467 INFO L225 Difference]: With dead ends: 193 [2020-10-12 10:14:17,467 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 10:14:17,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=683, Invalid=4147, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:14:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 10:14:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 89. [2020-10-12 10:14:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 10:14:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-12 10:14:17,486 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 44 [2020-10-12 10:14:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:17,486 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-12 10:14:17,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:14:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-12 10:14:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:14:17,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:17,487 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:17,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:14:17,488 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:17,488 INFO L82 PathProgramCache]: Analyzing trace with hash 571613985, now seen corresponding path program 7 times [2020-10-12 10:14:17,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:17,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342546121] [2020-10-12 10:14:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:17,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:18,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:18,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:21,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:21,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:14:21,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:14:21,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3919 [2020-10-12 10:14:21,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:21,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:14:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:14:21,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:21,793 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-12 10:14:22,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:22,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:22,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:22,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:22,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:22,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:22,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:22,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:22,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:22,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:22,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:22,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:22,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:22,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:22,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:22,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:22,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:22,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:22,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:22,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:22,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:22,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342546121] [2020-10-12 10:14:22,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:22,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:14:22,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184498234] [2020-10-12 10:14:22,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:14:22,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:14:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:14:22,412 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 21 states. [2020-10-12 10:14:23,123 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-12 10:14:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:24,937 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2020-10-12 10:14:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:14:24,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-12 10:14:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:24,940 INFO L225 Difference]: With dead ends: 166 [2020-10-12 10:14:24,940 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 10:14:24,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=505, Invalid=1945, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:14:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 10:14:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-12 10:14:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 10:14:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-12 10:14:24,960 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 44 [2020-10-12 10:14:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:24,960 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-12 10:14:24,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:14:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-12 10:14:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:14:24,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:24,961 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:24,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:14:24,961 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:24,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:24,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1232045627, now seen corresponding path program 7 times [2020-10-12 10:14:24,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:24,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806948211] [2020-10-12 10:14:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:24,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:25,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:14:25,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:14:25,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 892 [2020-10-12 10:14:25,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:14:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:14:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:25,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:25,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:25,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:25,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:25,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:25,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:14:25,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806948211] [2020-10-12 10:14:25,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:25,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:14:25,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991416833] [2020-10-12 10:14:25,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:14:25,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:25,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:14:25,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:14:25,980 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 12 states. [2020-10-12 10:14:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:26,420 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2020-10-12 10:14:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:14:26,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-12 10:14:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:26,425 INFO L225 Difference]: With dead ends: 163 [2020-10-12 10:14:26,425 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:14:26,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:14:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:14:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-12 10:14:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 10:14:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2020-10-12 10:14:26,445 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 46 [2020-10-12 10:14:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:26,446 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2020-10-12 10:14:26,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:14:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2020-10-12 10:14:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:14:26,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:26,447 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:26,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:14:26,447 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1241564193, now seen corresponding path program 8 times [2020-10-12 10:14:26,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:26,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060924830] [2020-10-12 10:14:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:26,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:26,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:28,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:29,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:29,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:30,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:31,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:31,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:14:31,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:14:31,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-12 10:14:31,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:14:31,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:14:31,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:31,990 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-12 10:14:32,131 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2020-10-12 10:14:32,402 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-12 10:14:32,668 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 10:14:32,976 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-12 10:14:33,170 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 10:14:33,378 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-12 10:14:33,589 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-12 10:14:33,934 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-12 10:14:34,098 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-12 10:14:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:34,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:34,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:34,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:34,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:34,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:34,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:34,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:34,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:14:34,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060924830] [2020-10-12 10:14:34,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:34,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:14:34,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349678963] [2020-10-12 10:14:34,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:14:34,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:14:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:14:34,830 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand 29 states. [2020-10-12 10:14:35,893 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 39 [2020-10-12 10:14:36,620 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-12 10:14:36,932 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-12 10:14:37,199 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-12 10:14:37,684 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-12 10:14:38,199 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 39 [2020-10-12 10:14:38,555 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-12 10:14:39,042 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2020-10-12 10:14:39,967 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 33 [2020-10-12 10:14:40,218 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-12 10:14:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:40,462 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-10-12 10:14:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:14:40,463 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-10-12 10:14:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:40,465 INFO L225 Difference]: With dead ends: 100 [2020-10-12 10:14:40,465 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 10:14:40,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=378, Invalid=2928, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:14:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 10:14:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-10-12 10:14:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:14:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-10-12 10:14:40,484 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 48 [2020-10-12 10:14:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:40,484 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-10-12 10:14:40,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:14:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-10-12 10:14:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:14:40,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:40,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:40,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:14:40,486 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1187378249, now seen corresponding path program 9 times [2020-10-12 10:14:40,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:40,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992242059] [2020-10-12 10:14:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:41,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:42,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:43,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:44,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:44,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:45,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:14:45,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:46,560 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-12 10:14:46,870 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-12 10:14:47,036 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 10:14:47,221 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 10:14:47,616 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 10:14:47,803 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-12 10:14:48,013 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 10:14:48,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-12 10:14:49,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:49,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:49,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:49,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:49,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:49,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:49,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:49,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:49,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:49,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:49,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:49,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992242059] [2020-10-12 10:14:49,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:49,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:14:49,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205902693] [2020-10-12 10:14:49,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:14:49,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:49,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:14:49,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:14:49,530 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 35 states. [2020-10-12 10:14:51,129 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-12 10:14:51,783 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 58 [2020-10-12 10:14:52,074 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-12 10:14:52,861 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2020-10-12 10:14:53,503 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-12 10:14:54,306 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 90 [2020-10-12 10:14:55,000 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2020-10-12 10:14:55,835 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2020-10-12 10:14:56,326 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 93 [2020-10-12 10:14:57,148 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-10-12 10:14:57,838 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-12 10:14:58,172 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-12 10:14:58,774 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2020-10-12 10:14:58,995 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-12 10:14:59,456 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-12 10:15:00,063 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-12 10:15:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:01,033 INFO L93 Difference]: Finished difference Result 129 states and 158 transitions. [2020-10-12 10:15:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 10:15:01,034 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 51 [2020-10-12 10:15:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:01,036 INFO L225 Difference]: With dead ends: 129 [2020-10-12 10:15:01,036 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 10:15:01,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=545, Invalid=4147, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:15:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 10:15:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-12 10:15:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 10:15:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2020-10-12 10:15:01,062 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 51 [2020-10-12 10:15:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:01,063 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2020-10-12 10:15:01,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:15:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2020-10-12 10:15:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:15:01,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:01,064 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:01,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:15:01,065 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash -806766457, now seen corresponding path program 8 times [2020-10-12 10:15:01,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:01,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462379901] [2020-10-12 10:15:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:01,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:01,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:01,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:02,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:05,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:06,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:15:06,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:15:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:15:06,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:15:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:15:06,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:07,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:07,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:07,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:07,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:07,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:07,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:07,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:07,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:07,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:07,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:07,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:07,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:07,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:07,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:07,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:07,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:15:07,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462379901] [2020-10-12 10:15:07,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:07,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:15:07,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548644108] [2020-10-12 10:15:07,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:15:07,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:07,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:15:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:15:07,139 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand 21 states. [2020-10-12 10:15:07,988 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-12 10:15:08,230 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-12 10:15:08,378 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-12 10:15:08,521 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-12 10:15:08,870 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-12 10:15:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:09,516 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2020-10-12 10:15:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:15:09,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-12 10:15:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:09,518 INFO L225 Difference]: With dead ends: 123 [2020-10-12 10:15:09,518 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 10:15:09,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=413, Invalid=1479, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:15:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 10:15:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2020-10-12 10:15:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 10:15:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2020-10-12 10:15:09,545 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 51 [2020-10-12 10:15:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:09,545 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2020-10-12 10:15:09,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:15:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2020-10-12 10:15:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:15:09,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:09,546 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:09,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:15:09,546 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1610080075, now seen corresponding path program 9 times [2020-10-12 10:15:09,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:09,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404544637] [2020-10-12 10:15:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:09,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:09,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:13,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:13,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:14,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:15:14,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:15:14,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:15:14,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:15:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:14,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:15:14,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:15,224 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-12 10:15:15,532 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-10-12 10:15:15,685 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2020-10-12 10:15:16,039 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-12 10:15:16,217 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-12 10:15:16,500 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-12 10:15:17,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:17,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:17,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:17,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:17,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:17,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:17,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:17,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:17,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:17,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404544637] [2020-10-12 10:15:17,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:17,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:15:17,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076282076] [2020-10-12 10:15:17,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:15:17,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:15:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:15:17,086 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand 26 states. [2020-10-12 10:15:17,628 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-12 10:15:18,550 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2020-10-12 10:15:18,880 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-12 10:15:19,183 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-12 10:15:19,830 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-12 10:15:19,973 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-12 10:15:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:20,588 INFO L93 Difference]: Finished difference Result 181 states and 229 transitions. [2020-10-12 10:15:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:15:20,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-10-12 10:15:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:20,591 INFO L225 Difference]: With dead ends: 181 [2020-10-12 10:15:20,591 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 10:15:20,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=555, Invalid=2751, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:15:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 10:15:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2020-10-12 10:15:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 10:15:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2020-10-12 10:15:20,616 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 51 [2020-10-12 10:15:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:20,617 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2020-10-12 10:15:20,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:15:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2020-10-12 10:15:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:15:20,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:20,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:20,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:15:20,618 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:20,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1053364743, now seen corresponding path program 10 times [2020-10-12 10:15:20,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:20,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177194241] [2020-10-12 10:15:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:20,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:20,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:20,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:21,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:21,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:23,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:24,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:24,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:25,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:25,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:15:25,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-12 10:15:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:15:25,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:15:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:15:25,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:26,124 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-12 10:15:26,390 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 10:15:26,544 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-12 10:15:26,701 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-12 10:15:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:27,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:27,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:27,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:27,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:27,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:27,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:27,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:27,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:27,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:27,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:27,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:27,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:27,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:27,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:27,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:27,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177194241] [2020-10-12 10:15:27,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:27,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:15:27,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793018729] [2020-10-12 10:15:27,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:15:27,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:27,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:15:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:15:27,453 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand 25 states. [2020-10-12 10:15:28,229 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-12 10:15:28,677 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-12 10:15:28,961 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2020-10-12 10:15:29,157 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2020-10-12 10:15:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:31,044 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2020-10-12 10:15:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:15:31,045 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-12 10:15:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:31,047 INFO L225 Difference]: With dead ends: 203 [2020-10-12 10:15:31,047 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 10:15:31,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=442, Invalid=2638, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 10:15:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 10:15:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2020-10-12 10:15:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 10:15:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2020-10-12 10:15:31,075 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 51 [2020-10-12 10:15:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:31,075 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2020-10-12 10:15:31,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:15:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2020-10-12 10:15:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:15:31,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:31,076 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:31,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:15:31,076 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1184361013, now seen corresponding path program 11 times [2020-10-12 10:15:31,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:31,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018896955] [2020-10-12 10:15:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:32,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:36,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:36,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:15:36,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:36,399 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-12 10:15:36,683 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-12 10:15:36,976 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-12 10:15:37,215 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-12 10:15:37,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:37,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:37,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:37,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:37,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:37,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:37,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:37,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:37,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:37,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:37,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:37,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:37,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:37,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:37,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:37,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:37,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018896955] [2020-10-12 10:15:37,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:37,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:15:37,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823597208] [2020-10-12 10:15:37,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:15:37,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:15:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:15:37,835 INFO L87 Difference]: Start difference. First operand 120 states and 155 transitions. Second operand 25 states. [2020-10-12 10:15:38,402 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2020-10-12 10:15:38,711 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2020-10-12 10:15:38,916 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2020-10-12 10:15:39,244 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2020-10-12 10:15:39,519 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2020-10-12 10:15:39,803 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2020-10-12 10:15:40,116 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-12 10:15:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:41,400 INFO L93 Difference]: Finished difference Result 201 states and 249 transitions. [2020-10-12 10:15:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:15:41,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-12 10:15:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:41,406 INFO L225 Difference]: With dead ends: 201 [2020-10-12 10:15:41,406 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 10:15:41,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:15:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 10:15:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 112. [2020-10-12 10:15:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 10:15:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2020-10-12 10:15:41,432 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 51 [2020-10-12 10:15:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:41,432 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2020-10-12 10:15:41,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:15:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2020-10-12 10:15:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 10:15:41,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:41,434 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:41,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:15:41,434 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:41,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1726209385, now seen corresponding path program 10 times [2020-10-12 10:15:41,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:41,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878972088] [2020-10-12 10:15:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:45,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:15:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:47,057 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-12 10:15:48,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:48,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:48,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:48,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:48,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878972088] [2020-10-12 10:15:48,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:48,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:15:48,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313804897] [2020-10-12 10:15:48,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:15:48,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:15:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:15:48,089 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand 28 states. [2020-10-12 10:15:48,781 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 31 [2020-10-12 10:15:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:49,685 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-12 10:15:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:15:49,686 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-10-12 10:15:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:49,687 INFO L225 Difference]: With dead ends: 132 [2020-10-12 10:15:49,687 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 10:15:49,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=350, Invalid=1290, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:15:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 10:15:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 97. [2020-10-12 10:15:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 10:15:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2020-10-12 10:15:49,709 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 51 [2020-10-12 10:15:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:49,709 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2020-10-12 10:15:49,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:15:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2020-10-12 10:15:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:15:49,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:49,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:49,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:15:49,711 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1972879019, now seen corresponding path program 11 times [2020-10-12 10:15:49,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:49,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689716528] [2020-10-12 10:15:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:49,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:49,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:51,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1975 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:15:51,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:51,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:51,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:51,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:51,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:51,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:51,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:51,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:51,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:51,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:51,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:51,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:51,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:51,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:51,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:51,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:51,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 10:15:51,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689716528] [2020-10-12 10:15:51,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:51,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:15:51,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168317867] [2020-10-12 10:15:51,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:15:51,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:15:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:15:51,843 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand 14 states. [2020-10-12 10:15:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:52,339 INFO L93 Difference]: Finished difference Result 183 states and 221 transitions. [2020-10-12 10:15:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:15:52,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-12 10:15:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:52,341 INFO L225 Difference]: With dead ends: 183 [2020-10-12 10:15:52,342 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 10:15:52,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:15:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 10:15:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2020-10-12 10:15:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 10:15:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-12 10:15:52,365 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 53 [2020-10-12 10:15:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:52,365 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-12 10:15:52,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:15:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-12 10:15:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:15:52,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:52,366 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:52,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:15:52,366 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:52,367 INFO L82 PathProgramCache]: Analyzing trace with hash 98557899, now seen corresponding path program 12 times [2020-10-12 10:15:52,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:52,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430910147] [2020-10-12 10:15:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:52,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:52,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:54,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:54,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:57,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:15:57,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:58,019 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-12 10:15:58,147 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-12 10:15:58,541 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-12 10:15:58,700 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-12 10:15:58,913 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-12 10:15:59,085 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-12 10:15:59,312 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-12 10:15:59,517 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-12 10:15:59,719 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-12 10:15:59,964 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-12 10:16:01,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:01,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:01,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:01,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:01,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:01,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:01,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:01,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:01,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:01,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:01,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:01,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:01,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:01,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:01,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:16:01,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430910147] [2020-10-12 10:16:01,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:01,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:16:01,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617527342] [2020-10-12 10:16:01,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:16:01,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:16:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:16:01,740 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 35 states. [2020-10-12 10:16:02,311 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-12 10:16:02,794 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-12 10:16:03,903 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-12 10:16:04,190 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2020-10-12 10:16:04,534 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 46 [2020-10-12 10:16:04,885 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2020-10-12 10:16:05,179 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-12 10:16:05,501 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-12 10:16:05,819 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2020-10-12 10:16:06,010 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 10:16:06,226 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-12 10:16:06,734 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2020-10-12 10:16:06,973 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-12 10:16:07,386 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 10:16:07,754 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2020-10-12 10:16:08,274 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-12 10:16:08,850 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:16:09,131 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-12 10:16:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,524 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-12 10:16:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:16:09,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2020-10-12 10:16:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,527 INFO L225 Difference]: With dead ends: 103 [2020-10-12 10:16:09,527 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 10:16:09,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=311, Invalid=3595, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 10:16:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 10:16:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-12 10:16:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:16:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-12 10:16:09,552 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 53 [2020-10-12 10:16:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,552 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-12 10:16:09,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:16:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-12 10:16:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:16:09,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:09,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:16:09,554 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,554 INFO L82 PathProgramCache]: Analyzing trace with hash -348871551, now seen corresponding path program 13 times [2020-10-12 10:16:09,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540725627] [2020-10-12 10:16:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:12,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:16:14,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-12 10:16:14,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5087 [2020-10-12 10:16:14,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:16:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:16:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:16:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:16:15,475 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-10-12 10:16:15,660 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2020-10-12 10:16:15,811 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2020-10-12 10:16:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:17,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:17,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:17,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:17,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:17,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:17,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:17,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:17,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:17,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:17,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:17,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:17,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:16:17,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540725627] [2020-10-12 10:16:17,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:17,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:16:17,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177086238] [2020-10-12 10:16:17,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:16:17,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:17,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:16:17,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:16:17,052 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 33 states. [2020-10-12 10:16:18,366 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-10-12 10:16:18,868 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-12 10:16:19,156 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-12 10:16:19,578 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-10-12 10:16:20,133 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-12 10:16:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:21,307 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2020-10-12 10:16:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:16:21,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 56 [2020-10-12 10:16:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:21,309 INFO L225 Difference]: With dead ends: 131 [2020-10-12 10:16:21,309 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 10:16:21,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=612, Invalid=3170, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 10:16:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 10:16:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2020-10-12 10:16:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 10:16:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-12 10:16:21,328 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 56 [2020-10-12 10:16:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:21,328 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-12 10:16:21,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:16:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-12 10:16:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:16:21,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:21,329 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:21,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:16:21,330 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1189396253, now seen corresponding path program 14 times [2020-10-12 10:16:21,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:21,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863001036] [2020-10-12 10:16:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:23,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:25,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:26,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:16:26,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 10:16:26,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:16:26,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:16:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:16:26,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:27,646 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-12 10:16:27,991 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-12 10:16:28,157 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-12 10:16:28,343 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-12 10:16:28,706 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-12 10:16:28,949 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-12 10:16:29,287 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-12 10:16:29,513 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-12 10:16:29,764 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-12 10:16:30,142 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-10-12 10:16:31,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:31,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:31,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:31,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:31,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:31,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:31,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:31,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:31,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:31,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:16:31,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863001036] [2020-10-12 10:16:31,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:31,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:16:31,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461108312] [2020-10-12 10:16:31,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:16:31,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:16:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:16:31,809 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 41 states. [2020-10-12 10:16:33,184 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-12 10:16:33,580 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2020-10-12 10:16:34,290 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 46 [2020-10-12 10:16:34,893 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 71 [2020-10-12 10:16:35,424 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 41 [2020-10-12 10:16:35,767 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-12 10:16:36,257 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-12 10:16:36,887 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-12 10:16:37,095 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-12 10:16:37,606 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-10-12 10:16:38,223 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2020-10-12 10:16:38,634 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-10-12 10:16:39,197 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-12 10:16:39,672 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-12 10:16:40,024 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-12 10:16:40,729 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2020-10-12 10:16:41,117 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-12 10:16:41,637 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-12 10:16:42,113 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-12 10:16:42,567 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 10:16:42,773 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-12 10:16:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:43,228 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2020-10-12 10:16:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 10:16:43,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-12 10:16:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:43,231 INFO L225 Difference]: With dead ends: 152 [2020-10-12 10:16:43,231 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 10:16:43,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=584, Invalid=4818, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 10:16:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 10:16:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-12 10:16:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 10:16:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2020-10-12 10:16:43,258 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 58 [2020-10-12 10:16:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:43,258 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2020-10-12 10:16:43,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:16:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2020-10-12 10:16:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:16:43,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:43,259 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:43,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:16:43,259 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2007044703, now seen corresponding path program 12 times [2020-10-12 10:16:43,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:43,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105663608] [2020-10-12 10:16:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:45,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:46,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:47,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:16:48,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:49,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:49,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:49,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:49,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:49,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:49,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:49,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:49,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:49,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:49,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:49,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:49,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:49,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:49,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:49,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:16:49,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105663608] [2020-10-12 10:16:49,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:49,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:16:49,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747846875] [2020-10-12 10:16:49,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:16:49,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:16:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:16:49,493 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand 24 states. [2020-10-12 10:16:50,944 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-12 10:16:51,187 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52