/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/array-examples/relax-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:11:23,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:11:23,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:11:23,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:11:23,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:11:23,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:11:23,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:11:23,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:11:23,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:11:23,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:11:23,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:11:23,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:11:23,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:11:23,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:11:23,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:11:23,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:11:23,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:11:23,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:11:23,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:11:23,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:11:23,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:11:23,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:11:23,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:11:23,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:11:23,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:11:23,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:11:23,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:11:23,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:11:23,849 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:11:23,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:11:23,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:11:23,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:11:23,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:11:23,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:11:23,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:11:23,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:11:23,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:11:23,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:11:23,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:11:23,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:11:23,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:11:23,860 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 [2020-10-27 14:11:23,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:11:23,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:11:23,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:11:23,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:11:23,891 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:11:23,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:11:23,891 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:11:23,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:11:23,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:11:23,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:11:23,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:11:23,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:11:23,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:11:23,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:11:23,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:11:23,893 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:11:23,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:11:23,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:11:23,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:11:23,894 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:11:23,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:11:23,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:11:23,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:11:23,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:11:23,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:11:23,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:11:23,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:11:23,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:11:23,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:11:23,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:11:24,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:11:24,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:11:24,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:11:24,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:11:24,361 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:11:24,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/relax-2.i [2020-10-27 14:11:24,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e44081f59/f6d1cccb71da41a09b6b5cf1939baaa5/FLAG69dcca4b2 [2020-10-27 14:11:25,253 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:11:25,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/relax-2.i [2020-10-27 14:11:25,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e44081f59/f6d1cccb71da41a09b6b5cf1939baaa5/FLAG69dcca4b2 [2020-10-27 14:11:25,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e44081f59/f6d1cccb71da41a09b6b5cf1939baaa5 [2020-10-27 14:11:25,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:11:25,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:11:25,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:11:25,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:11:25,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:11:25,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:11:25" (1/1) ... [2020-10-27 14:11:25,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35fd567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:25, skipping insertion in model container [2020-10-27 14:11:25,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:11:25" (1/1) ... [2020-10-27 14:11:25,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:11:25,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:11:26,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:11:26,141 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:11:26,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:11:26,346 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:11:26,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26 WrapperNode [2020-10-27 14:11:26,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:11:26,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:11:26,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:11:26,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:11:26,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (1/1) ... [2020-10-27 14:11:26,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:11:26,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:11:26,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:11:26,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:11:26,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (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 [2020-10-27 14:11:26,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:11:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:11:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:11:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:11:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:11:26,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 14:11:26,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 14:11:26,593 INFO L138 BoogieDeclarations]: Found implementation of procedure is_relaxed_prefix [2020-10-27 14:11:26,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:11:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-10-27 14:11:26,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:11:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:11:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:11:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:11:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:11:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:11:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:11:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:11:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:11:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 14:11:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 14:11:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 14:11:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 14:11:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 14:11:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 14:11:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 14:11:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 14:11:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 14:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 14:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 14:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 14:11:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 14:11:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 14:11:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 14:11:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 14:11:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 14:11:26,616 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 14:11:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 14:11:26,621 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 14:11:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 14:11:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 14:11:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 14:11:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 14:11:26,622 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 14:11:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 14:11:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 14:11:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 14:11:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 14:11:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 14:11:26,623 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 14:11:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 14:11:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 14:11:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 14:11:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 14:11:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 14:11:26,624 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 14:11:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 14:11:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 14:11:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 14:11:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 14:11:26,625 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 14:11:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 14:11:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 14:11:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 14:11:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 14:11:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 14:11:26,626 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 14:11:26,627 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 14:11:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 14:11:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 14:11:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 14:11:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 14:11:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 14:11:26,628 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 14:11:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 14:11:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 14:11:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 14:11:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 14:11:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 14:11:26,629 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 14:11:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 14:11:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 14:11:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 14:11:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 14:11:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 14:11:26,630 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 14:11:26,631 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 14:11:26,632 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 14:11:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 14:11:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 14:11:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 14:11:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 14:11:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 14:11:26,633 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 14:11:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 14:11:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 14:11:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure is_relaxed_prefix [2020-10-27 14:11:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:11:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:11:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:11:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:11:26,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:11:26,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:11:26,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:11:26,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:11:27,401 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:11:27,404 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 14:11:27,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:11:27 BoogieIcfgContainer [2020-10-27 14:11:27,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:11:27,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:11:27,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:11:27,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:11:27,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:11:25" (1/3) ... [2020-10-27 14:11:27,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc79916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:11:27, skipping insertion in model container [2020-10-27 14:11:27,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:11:26" (2/3) ... [2020-10-27 14:11:27,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc79916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:11:27, skipping insertion in model container [2020-10-27 14:11:27,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:11:27" (3/3) ... [2020-10-27 14:11:27,423 INFO L111 eAbstractionObserver]: Analyzing ICFG relax-2.i [2020-10-27 14:11:27,436 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:11:27,450 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:11:27,466 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:11:27,507 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:11:27,508 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:11:27,509 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:11:27,509 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:11:27,509 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:11:27,509 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:11:27,509 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:11:27,509 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:11:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-10-27 14:11:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:11:27,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:27,541 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] [2020-10-27 14:11:27,542 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -900021425, now seen corresponding path program 1 times [2020-10-27 14:11:27,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:27,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573518378] [2020-10-27 14:11:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:27,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:27,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:29,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:29,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:11:29,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:29,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2135 [2020-10-27 14:11:29,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:29,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:11:29,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:11:29,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:11:29,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:11:30,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:30,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:30,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:30,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:30,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:30,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:11:30,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:30,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:30,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:30,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:30,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:30,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:30,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:30,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:11:30,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:30,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 14:11:30,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:11:30,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:30,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:11:30,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:30,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573518378] [2020-10-27 14:11:30,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:30,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:11:30,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413586043] [2020-10-27 14:11:30,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:11:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:11:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:11:30,278 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 5 states. [2020-10-27 14:11:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:30,641 INFO L93 Difference]: Finished difference Result 118 states and 178 transitions. [2020-10-27 14:11:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:11:30,643 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 14:11:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:30,654 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:11:30,654 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:11:30,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:11:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:11:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-27 14:11:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:11:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-27 14:11:30,715 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 21 [2020-10-27 14:11:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:30,716 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-27 14:11:30,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:11:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-27 14:11:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:11:30,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:30,718 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] [2020-10-27 14:11:30,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:11:30,719 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1147289927, now seen corresponding path program 1 times [2020-10-27 14:11:30,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:30,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111992970] [2020-10-27 14:11:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:31,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:31,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:11:31,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:11:31,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-27 14:11:31,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:31,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:11:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:11:31,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:11:31,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:31,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:31,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:31,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:31,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:31,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:11:31,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:31,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:31,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:31,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:31,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:31,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:31,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:31,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:31,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:11:31,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:31,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 14:11:31,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:11:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:31,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111992970] [2020-10-27 14:11:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:31,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 14:11:31,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50912485] [2020-10-27 14:11:31,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:11:31,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:11:31,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:11:31,743 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 8 states. [2020-10-27 14:11:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:32,320 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-10-27 14:11:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:11:32,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-27 14:11:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:32,323 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:11:32,323 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:11:32,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:11:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:11:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-27 14:11:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:11:32,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-27 14:11:32,338 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 23 [2020-10-27 14:11:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:32,339 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-27 14:11:32,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:11:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-27 14:11:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:11:32,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:32,340 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] [2020-10-27 14:11:32,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:11:32,341 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1369855857, now seen corresponding path program 1 times [2020-10-27 14:11:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:32,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208982479] [2020-10-27 14:11:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:32,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:32,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:32,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:32,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 14:11:32,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:32,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-27 14:11:32,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:11:32,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:11:32,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:32,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:32,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:32,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:32,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:32,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:32,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:32,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:32,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:32,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:32,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:32,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:32,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:33,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:33,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:11:33,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:33,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 14:11:33,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:33,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:33,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:33,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:11:33,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:33,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208982479] [2020-10-27 14:11:33,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:33,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:11:33,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820284067] [2020-10-27 14:11:33,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:11:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:11:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:11:33,066 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 6 states. [2020-10-27 14:11:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:33,395 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-27 14:11:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:11:33,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 14:11:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:33,397 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:11:33,398 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:11:33,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:11:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:11:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 14:11:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:11:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-10-27 14:11:33,409 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 24 [2020-10-27 14:11:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:33,410 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-10-27 14:11:33,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:11:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-10-27 14:11:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 14:11:33,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:33,411 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] [2020-10-27 14:11:33,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:11:33,411 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:33,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1583483292, now seen corresponding path program 1 times [2020-10-27 14:11:33,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:33,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956131599] [2020-10-27 14:11:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:33,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:33,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:33,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:33,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:11:33,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:11:33,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 14:11:33,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:11:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:11:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:11:33,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:33,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:33,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:33,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:33,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:33,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:33,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:11:33,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:33,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:33,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:33,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:33,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:33,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:11:33,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 14:11:33,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:11:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:11:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:11:33,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:33,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956131599] [2020-10-27 14:11:33,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:33,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:11:33,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903893222] [2020-10-27 14:11:33,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:11:33,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:34,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:11:34,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:11:34,001 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 4 states. [2020-10-27 14:11:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:34,221 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-10-27 14:11:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:11:34,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 14:11:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:34,226 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:11:34,226 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:11:34,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:11:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:11:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-27 14:11:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:11:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-27 14:11:34,250 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 26 [2020-10-27 14:11:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:34,250 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-27 14:11:34,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:11:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-27 14:11:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 14:11:34,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:34,252 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] [2020-10-27 14:11:34,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:11:34,253 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1876886299, now seen corresponding path program 1 times [2020-10-27 14:11:34,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:34,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423385956] [2020-10-27 14:11:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:34,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:34,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:11:34,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:11:34,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-27 14:11:34,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:34,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:11:34,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:11:34,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:11:34,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:34,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:34,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:34,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:34,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:34,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:34,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:34,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:11:34,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:34,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:11:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423385956] [2020-10-27 14:11:34,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:34,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:11:34,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134271819] [2020-10-27 14:11:34,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:11:34,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:11:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:11:34,726 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 5 states. [2020-10-27 14:11:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:34,936 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2020-10-27 14:11:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:11:34,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-27 14:11:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:34,937 INFO L225 Difference]: With dead ends: 80 [2020-10-27 14:11:34,938 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:11:34,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:11:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:11:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-27 14:11:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:11:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-10-27 14:11:34,948 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 26 [2020-10-27 14:11:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:34,948 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-27 14:11:34,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:11:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-10-27 14:11:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:11:34,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:34,950 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] [2020-10-27 14:11:34,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:11:34,950 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1674658399, now seen corresponding path program 1 times [2020-10-27 14:11:34,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:34,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980473382] [2020-10-27 14:11:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:34,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:35,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:35,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:38,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:11:38,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:11:38,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3200 [2020-10-27 14:11:38,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:11:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:11:38,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:11:38,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:38,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:38,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:38,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:38,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:38,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:38,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:38,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:38,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-27 14:11:38,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:38,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:11:38,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:11:38,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:11:38,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:11:38,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:38,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980473382] [2020-10-27 14:11:38,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:38,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:11:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080029254] [2020-10-27 14:11:38,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:11:38,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:11:38,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:11:38,244 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 4 states. [2020-10-27 14:11:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:38,418 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-10-27 14:11:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:11:38,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:11:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:38,420 INFO L225 Difference]: With dead ends: 86 [2020-10-27 14:11:38,420 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 14:11:38,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:11:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 14:11:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-27 14:11:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:11:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2020-10-27 14:11:38,430 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 27 [2020-10-27 14:11:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:38,431 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2020-10-27 14:11:38,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:11:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2020-10-27 14:11:38,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:11:38,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:38,432 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] [2020-10-27 14:11:38,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:11:38,433 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash -450205267, now seen corresponding path program 1 times [2020-10-27 14:11:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735681906] [2020-10-27 14:11:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:40,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:11:40,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:11:40,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1642 [2020-10-27 14:11:40,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:11:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:11:40,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:11:40,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:40,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:40,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:40,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:40,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:40,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:11:40,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:40,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:40,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:40,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:40,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:11:40,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:40,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 14:11:40,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:40,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:11:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:40,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735681906] [2020-10-27 14:11:40,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:40,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:11:40,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265145571] [2020-10-27 14:11:40,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:11:40,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:11:40,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:11:40,393 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 7 states. [2020-10-27 14:11:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:40,830 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2020-10-27 14:11:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:11:40,831 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-27 14:11:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:40,833 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:11:40,833 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:11:40,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:11:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:11:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2020-10-27 14:11:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:11:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-27 14:11:40,846 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 30 [2020-10-27 14:11:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:40,847 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-27 14:11:40,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:11:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-10-27 14:11:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:11:40,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:40,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:40,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:11:40,849 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1957437009, now seen corresponding path program 1 times [2020-10-27 14:11:40,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:40,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019398915] [2020-10-27 14:11:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:41,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:41,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:41,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:44,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:11:44,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:11:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3181 [2020-10-27 14:11:44,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:11:44,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:11:44,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:11:44,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:44,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:44,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:44,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:44,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:11:44,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:44,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:11:44,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:44,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:44,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:11:44,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:44,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:11:44,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:44,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:11:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019398915] [2020-10-27 14:11:44,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:44,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:11:44,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497402576] [2020-10-27 14:11:44,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:11:44,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:11:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:11:44,218 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 8 states. [2020-10-27 14:11:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:44,632 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-10-27 14:11:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:11:44,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 14:11:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:44,635 INFO L225 Difference]: With dead ends: 91 [2020-10-27 14:11:44,635 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 14:11:44,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:11:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 14:11:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-27 14:11:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:11:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-27 14:11:44,657 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 33 [2020-10-27 14:11:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:44,658 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-27 14:11:44,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:11:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-27 14:11:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:11:44,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:44,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:44,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:11:44,663 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -562522925, now seen corresponding path program 1 times [2020-10-27 14:11:44,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:44,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66964836] [2020-10-27 14:11:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:44,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:46,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:46,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:11:46,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:11:46,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-27 14:11:46,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:11:46,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:11:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:46,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:46,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:46,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:46,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:46,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:46,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:46,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:46,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:46,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:46,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:46,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:11:46,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:46,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-27 14:11:46,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:46,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:11:46,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:46,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:11:46,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:11:46,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66964836] [2020-10-27 14:11:46,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:46,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:11:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456231112] [2020-10-27 14:11:46,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:11:46,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:11:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:11:46,840 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 6 states. [2020-10-27 14:11:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:47,255 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2020-10-27 14:11:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:11:47,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 14:11:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:47,257 INFO L225 Difference]: With dead ends: 121 [2020-10-27 14:11:47,257 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:11:47,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:11:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:11:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2020-10-27 14:11:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:11:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-10-27 14:11:47,279 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 33 [2020-10-27 14:11:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:47,279 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-10-27 14:11:47,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:11:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-10-27 14:11:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:11:47,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:47,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:47,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:11:47,289 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:47,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1564409999, now seen corresponding path program 1 times [2020-10-27 14:11:47,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:47,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259745277] [2020-10-27 14:11:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:47,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:47,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:47,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:47,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:47,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:47,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:48,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:50,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:50,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:11:50,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:11:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3391 [2020-10-27 14:11:50,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:11:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:11:50,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:11:50,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:50,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:50,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:50,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:50,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:50,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:11:50,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:50,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:50,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:50,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:50,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:50,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:50,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:50,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:50,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:11:50,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 14:11:50,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:11:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:11:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:51,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259745277] [2020-10-27 14:11:51,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:11:51,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:11:51,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325867598] [2020-10-27 14:11:51,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:11:51,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:11:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:11:51,144 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 10 states. [2020-10-27 14:11:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:52,093 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2020-10-27 14:11:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:11:52,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 14:11:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:52,095 INFO L225 Difference]: With dead ends: 187 [2020-10-27 14:11:52,095 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 14:11:52,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:11:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 14:11:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2020-10-27 14:11:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 14:11:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2020-10-27 14:11:52,110 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 33 [2020-10-27 14:11:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:52,111 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2020-10-27 14:11:52,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:11:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2020-10-27 14:11:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:11:52,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:52,112 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:11:52,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:11:52,113 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash -579183393, now seen corresponding path program 1 times [2020-10-27 14:11:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:52,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382808738] [2020-10-27 14:11:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:52,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:53,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:53,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:56,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:11:56,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:11:56,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4366 [2020-10-27 14:11:56,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:11:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:11:56,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:11:56,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:56,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:11:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:56,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:56,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:11:56,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:11:56,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:56,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:11:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:56,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:56,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:11:56,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:56,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:11:56,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:56,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:56,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:11:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:56,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:11:56,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:11:56,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:11:56,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:11:56,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:11:56,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:11:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:11:56,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:11:56,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:11:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:11:56,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382808738] [2020-10-27 14:11:56,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:11:56,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:11:56,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453544331] [2020-10-27 14:11:56,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:11:56,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:11:56,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:11:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:11:56,635 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand 4 states. [2020-10-27 14:11:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:11:56,851 INFO L93 Difference]: Finished difference Result 145 states and 187 transitions. [2020-10-27 14:11:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:11:56,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 14:11:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:11:56,853 INFO L225 Difference]: With dead ends: 145 [2020-10-27 14:11:56,854 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 14:11:56,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:11:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 14:11:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-10-27 14:11:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:11:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2020-10-27 14:11:56,871 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 35 [2020-10-27 14:11:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:11:56,872 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2020-10-27 14:11:56,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:11:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2020-10-27 14:11:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 14:11:56,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:11:56,874 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, 1, 1] [2020-10-27 14:11:56,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:11:56,875 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:11:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:11:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1254231256, now seen corresponding path program 1 times [2020-10-27 14:11:56,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:11:56,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187476049] [2020-10-27 14:11:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:11:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:11:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:56,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:57,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:57,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:11:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:00,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:00,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:12:00,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:12:00,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3115 [2020-10-27 14:12:00,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:00,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:12:00,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:12:00,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:12:00,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:02,457 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-10-27 14:12:02,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:02,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:02,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:02,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:02,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:02,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:12:02,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:02,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:02,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:02,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:02,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:02,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:02,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:02,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:12:02,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:12:02,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 14:12:02,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:12:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:02,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:12:02,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:12:02,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187476049] [2020-10-27 14:12:02,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:02,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:12:02,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597419313] [2020-10-27 14:12:02,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:12:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:02,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:12:02,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=71, Unknown=1, NotChecked=0, Total=90 [2020-10-27 14:12:02,968 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand 10 states. [2020-10-27 14:12:03,688 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-27 14:12:12,273 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 14:12:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:25,710 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2020-10-27 14:12:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:12:25,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-27 14:12:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:25,713 INFO L225 Difference]: With dead ends: 194 [2020-10-27 14:12:25,715 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 14:12:25,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=63, Invalid=207, Unknown=2, NotChecked=0, Total=272 [2020-10-27 14:12:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 14:12:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 125. [2020-10-27 14:12:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 14:12:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-10-27 14:12:25,745 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 34 [2020-10-27 14:12:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:25,745 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-10-27 14:12:25,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:12:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-10-27 14:12:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:12:25,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:25,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:25,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:12:25,747 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:25,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:25,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2074638125, now seen corresponding path program 2 times [2020-10-27 14:12:25,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:25,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274192809] [2020-10-27 14:12:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:25,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:25,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:25,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:26,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:26,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:26,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:27,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:27,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:30,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:30,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:12:30,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:12:30,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:12:30,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:12:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:12:30,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:12:30,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:30,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:30,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:30,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:30,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:12:30,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:30,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:30,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:30,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:30,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:30,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:12:30,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:30,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:12:30,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:30,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:30,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:12:30,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274192809] [2020-10-27 14:12:30,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:30,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:12:30,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335563989] [2020-10-27 14:12:30,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:12:30,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:30,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:12:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:12:30,961 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 9 states. [2020-10-27 14:12:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:31,442 INFO L93 Difference]: Finished difference Result 150 states and 194 transitions. [2020-10-27 14:12:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:12:31,443 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 14:12:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:31,444 INFO L225 Difference]: With dead ends: 150 [2020-10-27 14:12:31,444 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 14:12:31,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:12:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 14:12:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2020-10-27 14:12:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 14:12:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2020-10-27 14:12:31,473 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 36 [2020-10-27 14:12:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:31,473 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2020-10-27 14:12:31,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:12:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2020-10-27 14:12:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:12:31,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:31,475 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, 1, 1] [2020-10-27 14:12:31,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:12:31,475 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:31,476 INFO L82 PathProgramCache]: Analyzing trace with hash -268151432, now seen corresponding path program 1 times [2020-10-27 14:12:31,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:31,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004711209] [2020-10-27 14:12:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:31,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:31,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:31,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:31,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:32,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:34,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:34,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3055 [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:12:34,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:34,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:34,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:34,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:34,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:12:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:34,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:34,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:34,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:34,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 14:12:34,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:34,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-27 14:12:34,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:12:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:12:34,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:12:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004711209] [2020-10-27 14:12:35,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:35,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:12:35,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877992627] [2020-10-27 14:12:35,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:12:35,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:12:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:12:35,208 INFO L87 Difference]: Start difference. First operand 131 states and 170 transitions. Second operand 14 states. [2020-10-27 14:12:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:36,537 INFO L93 Difference]: Finished difference Result 248 states and 321 transitions. [2020-10-27 14:12:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:12:36,538 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 14:12:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:36,543 INFO L225 Difference]: With dead ends: 248 [2020-10-27 14:12:36,543 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:12:36,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:12:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:12:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 144. [2020-10-27 14:12:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 14:12:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 185 transitions. [2020-10-27 14:12:36,578 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 185 transitions. Word has length 37 [2020-10-27 14:12:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:36,579 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 185 transitions. [2020-10-27 14:12:36,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:12:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 185 transitions. [2020-10-27 14:12:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:12:36,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:36,580 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, 1, 1, 1, 1, 1] [2020-10-27 14:12:36,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:12:36,580 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash 760295095, now seen corresponding path program 1 times [2020-10-27 14:12:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:36,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416038582] [2020-10-27 14:12:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:36,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:36,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:36,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:36,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:38,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:12:41,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:41,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:41,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:41,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:41,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:41,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:41,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:41,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:12:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:41,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:41,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:41,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:12:41,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:41,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:12:41,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:41,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:41,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:12:41,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416038582] [2020-10-27 14:12:41,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:41,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:12:41,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263994956] [2020-10-27 14:12:41,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:12:41,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:12:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:12:41,745 INFO L87 Difference]: Start difference. First operand 144 states and 185 transitions. Second operand 6 states. [2020-10-27 14:12:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:42,062 INFO L93 Difference]: Finished difference Result 173 states and 221 transitions. [2020-10-27 14:12:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:12:42,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-27 14:12:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:42,065 INFO L225 Difference]: With dead ends: 173 [2020-10-27 14:12:42,065 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:12:42,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:12:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:12:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2020-10-27 14:12:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 14:12:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 186 transitions. [2020-10-27 14:12:42,095 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 186 transitions. Word has length 40 [2020-10-27 14:12:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:42,096 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 186 transitions. [2020-10-27 14:12:42,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:12:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 186 transitions. [2020-10-27 14:12:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:12:42,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:42,097 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:42,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:12:42,097 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1804673233, now seen corresponding path program 3 times [2020-10-27 14:12:42,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:42,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945711542] [2020-10-27 14:12:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:42,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:43,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:43,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:43,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:45,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:45,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:47,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:12:47,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:12:47,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:47,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:47,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:47,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:47,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:47,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:47,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:12:47,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:47,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:47,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:47,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:47,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:47,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:47,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:12:47,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945711542] [2020-10-27 14:12:47,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:47,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:12:47,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203076783] [2020-10-27 14:12:47,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:12:47,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:12:47,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:12:47,328 INFO L87 Difference]: Start difference. First operand 145 states and 186 transitions. Second operand 10 states. [2020-10-27 14:12:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:47,951 INFO L93 Difference]: Finished difference Result 170 states and 218 transitions. [2020-10-27 14:12:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:12:47,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 14:12:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:47,954 INFO L225 Difference]: With dead ends: 170 [2020-10-27 14:12:47,955 INFO L226 Difference]: Without dead ends: 160 [2020-10-27 14:12:47,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:12:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-27 14:12:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2020-10-27 14:12:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 14:12:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 194 transitions. [2020-10-27 14:12:47,977 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 194 transitions. Word has length 39 [2020-10-27 14:12:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:47,978 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 194 transitions. [2020-10-27 14:12:47,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:12:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 194 transitions. [2020-10-27 14:12:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:12:47,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:47,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:47,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:12:47,979 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash 903322971, now seen corresponding path program 1 times [2020-10-27 14:12:47,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:47,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241935711] [2020-10-27 14:12:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:49,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2662 [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:12:50,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:12:50,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:50,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:50,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:50,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:50,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:50,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:50,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:50,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 14:12:50,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 14:12:50,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:12:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:12:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:12:51,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241935711] [2020-10-27 14:12:51,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:51,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:12:51,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822022891] [2020-10-27 14:12:51,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:12:51,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:12:51,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:12:51,147 INFO L87 Difference]: Start difference. First operand 151 states and 194 transitions. Second operand 12 states. [2020-10-27 14:12:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:12:52,492 INFO L93 Difference]: Finished difference Result 286 states and 380 transitions. [2020-10-27 14:12:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:12:52,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 14:12:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:12:52,495 INFO L225 Difference]: With dead ends: 286 [2020-10-27 14:12:52,496 INFO L226 Difference]: Without dead ends: 241 [2020-10-27 14:12:52,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:12:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-27 14:12:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 176. [2020-10-27 14:12:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 14:12:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 227 transitions. [2020-10-27 14:12:52,538 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 227 transitions. Word has length 39 [2020-10-27 14:12:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:12:52,538 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 227 transitions. [2020-10-27 14:12:52,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:12:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 227 transitions. [2020-10-27 14:12:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:12:52,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:12:52,540 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:12:52,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:12:52,540 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:12:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:12:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1491790012, now seen corresponding path program 1 times [2020-10-27 14:12:52,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:12:52,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932627209] [2020-10-27 14:12:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:12:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:53,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:53,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:53,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:53,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3993 [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:12:56,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:12:56,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:56,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:12:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:56,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:56,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:12:56,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:12:56,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:12:56,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:56,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:12:56,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:56,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:12:56,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:56,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:12:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:12:56,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:56,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:12:56,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:12:56,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:12:56,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:12:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:12:57,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932627209] [2020-10-27 14:12:57,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:12:57,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:12:57,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83078792] [2020-10-27 14:12:57,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:12:57,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:12:57,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:12:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:12:57,375 INFO L87 Difference]: Start difference. First operand 176 states and 227 transitions. Second operand 12 states. [2020-10-27 14:12:57,935 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 14:13:02,343 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 14:13:02,584 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-27 14:13:06,859 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div c_is_relaxed_prefix_~i~0 4294967296)))) (let ((.cse0 (<= (+ .cse2 2) c_is_relaxed_prefix_~i~0)) (.cse3 (div c_is_relaxed_prefix_~a_length 4294967296)) (.cse1 (div c_is_relaxed_prefix_~pat_length 4294967296))) (and (= |c_#t~string0.offset| |c_old(#t~string0.offset)|) (= |c_old(#length)| |c_#length|) (= |c_is_relaxed_prefix_#in~a_length| c_is_relaxed_prefix_~a_length) (or .cse0 (<= (+ (* 4294967296 .cse1) c_is_relaxed_prefix_~i~0 4294967295) (+ .cse2 c_is_relaxed_prefix_~pat_length))) (= |c_#t~string0.base| |c_old(#t~string0.base)|) (= |c_old(#valid)| |c_#valid|) (or .cse0 (<= (+ c_is_relaxed_prefix_~i~0 (* 4294967296 .cse3) 4294967295) (+ c_is_relaxed_prefix_~a_length .cse2))) (<= (+ (* 4294967296 (div (+ (* |c_is_relaxed_prefix_#in~a_length| (- 1)) 4294967298) 4294967296)) |c_is_relaxed_prefix_#in~a_length|) 4294967295) (= |c_#t~string1.base| |c_old(#t~string1.base)|) (= |c_is_relaxed_prefix_#in~pat_length| c_is_relaxed_prefix_~pat_length) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ (* 4294967296 (div (+ (* |c_is_relaxed_prefix_#in~pat_length| (- 1)) 4294967298) 4294967296)) |c_is_relaxed_prefix_#in~pat_length|) 4294967295) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div (+ (* c_is_relaxed_prefix_~a_length (- 1)) c_is_relaxed_prefix_~i~0 (* .cse3 4294967296) 4294967295) 4294967296)) 1) c_is_relaxed_prefix_~i~0) (<= (+ (* 4294967296 (div (+ (* .cse1 4294967296) c_is_relaxed_prefix_~i~0 (* c_is_relaxed_prefix_~pat_length (- 1)) 4294967295) 4294967296)) 1) c_is_relaxed_prefix_~i~0) (= |c_#t~string1.offset| |c_old(#t~string1.offset)|)))) is different from false [2020-10-27 14:13:09,174 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-10-27 14:13:11,579 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 14:13:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:12,096 INFO L93 Difference]: Finished difference Result 255 states and 331 transitions. [2020-10-27 14:13:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:13:12,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-27 14:13:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:12,100 INFO L225 Difference]: With dead ends: 255 [2020-10-27 14:13:12,100 INFO L226 Difference]: Without dead ends: 244 [2020-10-27 14:13:12,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=102, Invalid=320, Unknown=2, NotChecked=38, Total=462 [2020-10-27 14:13:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-27 14:13:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 182. [2020-10-27 14:13:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-27 14:13:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 235 transitions. [2020-10-27 14:13:12,131 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 235 transitions. Word has length 40 [2020-10-27 14:13:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:12,131 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 235 transitions. [2020-10-27 14:13:12,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:13:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 235 transitions. [2020-10-27 14:13:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:13:12,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:12,133 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:12,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:13:12,133 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:12,134 INFO L82 PathProgramCache]: Analyzing trace with hash -540646227, now seen corresponding path program 4 times [2020-10-27 14:13:12,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:12,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054956607] [2020-10-27 14:13:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:12,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:12,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:13,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:13,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:14,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:16,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:13:17,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:13:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:13:17,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:17,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:17,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:17,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:17,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:13:17,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054956607] [2020-10-27 14:13:17,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:17,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:13:17,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408992381] [2020-10-27 14:13:17,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:13:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:13:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:13:17,359 INFO L87 Difference]: Start difference. First operand 182 states and 235 transitions. Second operand 11 states. [2020-10-27 14:13:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:18,000 INFO L93 Difference]: Finished difference Result 207 states and 267 transitions. [2020-10-27 14:13:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:13:18,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 14:13:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:18,003 INFO L225 Difference]: With dead ends: 207 [2020-10-27 14:13:18,003 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 14:13:18,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:13:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 14:13:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2020-10-27 14:13:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 14:13:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2020-10-27 14:13:18,031 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 42 [2020-10-27 14:13:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:18,032 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2020-10-27 14:13:18,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:13:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2020-10-27 14:13:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:13:18,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:18,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:18,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:13:18,033 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:18,034 INFO L82 PathProgramCache]: Analyzing trace with hash 175757229, now seen corresponding path program 2 times [2020-10-27 14:13:18,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:18,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034383978] [2020-10-27 14:13:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:18,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:19,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4591 [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:13:22,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:13:22,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:13:22,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:22,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:22,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:22,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:23,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:23,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:13:23,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:13:23,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034383978] [2020-10-27 14:13:23,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:23,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:13:23,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657198296] [2020-10-27 14:13:23,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:13:23,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:13:23,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:13:23,466 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand 12 states. [2020-10-27 14:13:23,773 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 14:13:24,222 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-27 14:13:24,556 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-27 14:13:24,963 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2020-10-27 14:13:27,582 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-10-27 14:13:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:28,379 INFO L93 Difference]: Finished difference Result 313 states and 407 transitions. [2020-10-27 14:13:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:13:28,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 14:13:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:28,383 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:13:28,383 INFO L226 Difference]: Without dead ends: 303 [2020-10-27 14:13:28,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:13:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-27 14:13:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 191. [2020-10-27 14:13:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 14:13:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 247 transitions. [2020-10-27 14:13:28,423 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 247 transitions. Word has length 42 [2020-10-27 14:13:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:28,424 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 247 transitions. [2020-10-27 14:13:28,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:13:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 247 transitions. [2020-10-27 14:13:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:13:28,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:28,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:28,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:13:28,426 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1293815434, now seen corresponding path program 1 times [2020-10-27 14:13:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:28,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071661728] [2020-10-27 14:13:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:28,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:28,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:29,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:30,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:33,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:33,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:13:33,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:13:33,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:13:33,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:13:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:13:33,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:13:33,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:33,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:33,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:33,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:33,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:33,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:33,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:13:33,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:33,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:13:33,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:33,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:33,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:33,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:13:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:33,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:33,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:33,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:13:33,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:33,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:13:33,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:33,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:33,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:33,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 14:13:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:33,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:33,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:33,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:13:33,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:33,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:13:33,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:33,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:13:33,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:33,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:13:33,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071661728] [2020-10-27 14:13:33,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:13:33,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:13:33,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187869027] [2020-10-27 14:13:33,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:13:33,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:13:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:13:33,624 INFO L87 Difference]: Start difference. First operand 191 states and 247 transitions. Second operand 5 states. [2020-10-27 14:13:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:34,084 INFO L93 Difference]: Finished difference Result 226 states and 290 transitions. [2020-10-27 14:13:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:13:34,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-27 14:13:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:34,086 INFO L225 Difference]: With dead ends: 226 [2020-10-27 14:13:34,086 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:13:34,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:13:34,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:13:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-10-27 14:13:34,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 14:13:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 246 transitions. [2020-10-27 14:13:34,125 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 246 transitions. Word has length 45 [2020-10-27 14:13:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:34,125 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 246 transitions. [2020-10-27 14:13:34,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:13:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 246 transitions. [2020-10-27 14:13:34,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:13:34,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:34,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:34,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:13:34,127 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:34,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1074960716, now seen corresponding path program 1 times [2020-10-27 14:13:34,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:34,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462734271] [2020-10-27 14:13:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:34,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:35,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:35,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:13:35,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:13:35,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-27 14:13:35,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:13:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:13:35,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:13:35,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:35,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:35,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:35,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:35,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:35,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:35,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:13:35,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:35,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:35,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:35,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:35,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:35,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:35,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:35,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:35,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 14:13:35,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 14:13:35,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:13:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:13:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:35,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 14:13:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:35,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:35,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:35,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:13:35,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:35,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:13:35,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:13:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:35,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:13:35,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:35,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 14:13:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:35,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:35,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:13:35,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:35,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:13:35,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:13:35,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:35,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:13:35,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:13:35,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462734271] [2020-10-27 14:13:35,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:13:35,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 14:13:35,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404559753] [2020-10-27 14:13:35,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:13:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:13:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:13:35,431 INFO L87 Difference]: Start difference. First operand 191 states and 246 transitions. Second operand 7 states. [2020-10-27 14:13:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:36,074 INFO L93 Difference]: Finished difference Result 228 states and 290 transitions. [2020-10-27 14:13:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:13:36,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-27 14:13:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:36,079 INFO L225 Difference]: With dead ends: 228 [2020-10-27 14:13:36,079 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 14:13:36,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:13:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 14:13:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-27 14:13:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 14:13:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 245 transitions. [2020-10-27 14:13:36,126 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 245 transitions. Word has length 45 [2020-10-27 14:13:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:36,127 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 245 transitions. [2020-10-27 14:13:36,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:13:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 245 transitions. [2020-10-27 14:13:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:13:36,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:36,128 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-10-27 14:13:36,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:13:36,129 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 209356644, now seen corresponding path program 2 times [2020-10-27 14:13:36,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:36,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741320052] [2020-10-27 14:13:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:36,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:36,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:37,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:13:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4051 [2020-10-27 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:13:40,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:40,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:40,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:40,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:40,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:40,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:40,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:40,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:40,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 14:13:40,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:40,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 14:13:40,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:13:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:40,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:13:40,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:13:41,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741320052] [2020-10-27 14:13:41,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:41,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:13:41,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124072957] [2020-10-27 14:13:41,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:13:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:13:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:13:41,072 INFO L87 Difference]: Start difference. First operand 191 states and 245 transitions. Second operand 16 states. [2020-10-27 14:13:41,461 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 14:13:41,691 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 14:13:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:43,591 INFO L93 Difference]: Finished difference Result 334 states and 430 transitions. [2020-10-27 14:13:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:13:43,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 14:13:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:43,594 INFO L225 Difference]: With dead ends: 334 [2020-10-27 14:13:43,594 INFO L226 Difference]: Without dead ends: 236 [2020-10-27 14:13:43,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:13:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-27 14:13:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 204. [2020-10-27 14:13:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 14:13:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-10-27 14:13:43,627 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 43 [2020-10-27 14:13:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:43,627 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-10-27 14:13:43,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:13:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-10-27 14:13:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:13:43,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:43,628 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-10-27 14:13:43,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:13:43,628 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1674846486, now seen corresponding path program 3 times [2020-10-27 14:13:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:43,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464199772] [2020-10-27 14:13:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:44,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:44,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:44,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:44,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:45,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:45,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:45,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:46,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:48,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:13:48,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:13:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:13:48,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:13:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:13:48,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:13:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:48,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:48,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:48,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:48,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:48,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:13:48,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:48,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:48,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:48,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:48,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:48,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:48,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:13:48,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 14:13:49,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464199772] [2020-10-27 14:13:49,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:49,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:13:49,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096069982] [2020-10-27 14:13:49,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:13:49,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:49,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:13:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:13:49,056 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 10 states. [2020-10-27 14:13:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:50,214 INFO L93 Difference]: Finished difference Result 318 states and 416 transitions. [2020-10-27 14:13:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:13:50,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 14:13:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:50,218 INFO L225 Difference]: With dead ends: 318 [2020-10-27 14:13:50,218 INFO L226 Difference]: Without dead ends: 268 [2020-10-27 14:13:50,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:13:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-27 14:13:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 204. [2020-10-27 14:13:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-27 14:13:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 257 transitions. [2020-10-27 14:13:50,252 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 257 transitions. Word has length 43 [2020-10-27 14:13:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:50,252 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 257 transitions. [2020-10-27 14:13:50,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:13:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 257 transitions. [2020-10-27 14:13:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:13:50,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:50,254 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-10-27 14:13:50,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:13:50,254 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1240584146, now seen corresponding path program 4 times [2020-10-27 14:13:50,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:50,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492114672] [2020-10-27 14:13:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:50,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:50,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:51,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:51,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:54,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:54,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:13:54,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:13:54,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4507 [2020-10-27 14:13:54,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:54,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:13:54,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:13:54,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:13:54,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:55,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:13:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:55,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:13:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:55,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:13:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:55,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:13:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:13:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:13:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:13:55,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:13:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:13:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492114672] [2020-10-27 14:13:55,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:13:55,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:13:55,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996972327] [2020-10-27 14:13:55,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:13:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:13:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:13:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:13:55,513 INFO L87 Difference]: Start difference. First operand 204 states and 257 transitions. Second operand 16 states. [2020-10-27 14:13:55,854 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 14:13:56,103 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 14:13:56,398 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 14:13:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:13:58,155 INFO L93 Difference]: Finished difference Result 352 states and 445 transitions. [2020-10-27 14:13:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:13:58,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 14:13:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:13:58,159 INFO L225 Difference]: With dead ends: 352 [2020-10-27 14:13:58,159 INFO L226 Difference]: Without dead ends: 251 [2020-10-27 14:13:58,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:13:58,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-27 14:13:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 215. [2020-10-27 14:13:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 14:13:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 270 transitions. [2020-10-27 14:13:58,198 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 270 transitions. Word has length 43 [2020-10-27 14:13:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:13:58,199 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 270 transitions. [2020-10-27 14:13:58,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:13:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 270 transitions. [2020-10-27 14:13:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:13:58,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:13:58,201 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:13:58,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:13:58,201 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:13:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:13:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash 575292241, now seen corresponding path program 5 times [2020-10-27 14:13:58,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:13:58,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926554793] [2020-10-27 14:13:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:13:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:13:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:58,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:58,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:58,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:13:59,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:02,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:14:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:03,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:03,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:03,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:03,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:03,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:14:03,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:03,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:14:03,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:03,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:03,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:03,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:14:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926554793] [2020-10-27 14:14:03,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:03,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:14:03,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104936078] [2020-10-27 14:14:03,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:14:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:14:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:14:03,611 INFO L87 Difference]: Start difference. First operand 215 states and 270 transitions. Second operand 12 states. [2020-10-27 14:14:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:04,537 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2020-10-27 14:14:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:14:04,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 14:14:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:04,541 INFO L225 Difference]: With dead ends: 240 [2020-10-27 14:14:04,541 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 14:14:04,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:14:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 14:14:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2020-10-27 14:14:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-27 14:14:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 278 transitions. [2020-10-27 14:14:04,584 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 278 transitions. Word has length 45 [2020-10-27 14:14:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:04,585 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 278 transitions. [2020-10-27 14:14:04,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:14:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 278 transitions. [2020-10-27 14:14:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:14:04,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:04,586 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-10-27 14:14:04,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:14:04,587 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:04,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash 865129103, now seen corresponding path program 3 times [2020-10-27 14:14:04,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:04,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085186376] [2020-10-27 14:14:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:04,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:05,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:05,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:06,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:06,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:06,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:14:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:14:09,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:14:09,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:09,935 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 45 [2020-10-27 14:14:09,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:10,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:10,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:10,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:10,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:10,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:10,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:10,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:10,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:10,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:10,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:10,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:10,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 14:14:10,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 14:14:10,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:14:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:14:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:10,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085186376] [2020-10-27 14:14:10,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:10,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:14:10,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75327692] [2020-10-27 14:14:10,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:14:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:10,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:14:10,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:14:10,454 INFO L87 Difference]: Start difference. First operand 221 states and 278 transitions. Second operand 14 states. [2020-10-27 14:14:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:12,442 INFO L93 Difference]: Finished difference Result 386 states and 501 transitions. [2020-10-27 14:14:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:14:12,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 14:14:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:12,446 INFO L225 Difference]: With dead ends: 386 [2020-10-27 14:14:12,447 INFO L226 Difference]: Without dead ends: 329 [2020-10-27 14:14:12,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:14:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-27 14:14:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 251. [2020-10-27 14:14:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 14:14:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 316 transitions. [2020-10-27 14:14:12,541 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 316 transitions. Word has length 45 [2020-10-27 14:14:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:12,542 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 316 transitions. [2020-10-27 14:14:12,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:14:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 316 transitions. [2020-10-27 14:14:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 14:14:12,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:12,549 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1] [2020-10-27 14:14:12,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:14:12,550 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash -233924696, now seen corresponding path program 5 times [2020-10-27 14:14:12,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:12,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416752143] [2020-10-27 14:14:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:12,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:12,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:13,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:13,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:13,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:14,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:15,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:15,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:15,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:15,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:17,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:17,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:14:17,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:14:17,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:14:17,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:14:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:14:17,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:14:17,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:18,165 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 20 [2020-10-27 14:14:18,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:18,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:18,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:18,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:18,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:14:18,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:19,138 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-27 14:14:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:19,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416752143] [2020-10-27 14:14:19,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:19,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:14:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471230928] [2020-10-27 14:14:19,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:14:19,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:14:19,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:14:19,220 INFO L87 Difference]: Start difference. First operand 251 states and 316 transitions. Second operand 14 states. [2020-10-27 14:14:19,651 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 14:14:19,964 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-27 14:14:20,389 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 14:14:20,962 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 14:14:21,441 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-27 14:14:23,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:23,112 INFO L93 Difference]: Finished difference Result 447 states and 573 transitions. [2020-10-27 14:14:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:14:23,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-27 14:14:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:23,117 INFO L225 Difference]: With dead ends: 447 [2020-10-27 14:14:23,118 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 14:14:23,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:14:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 14:14:23,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 260. [2020-10-27 14:14:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 14:14:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 328 transitions. [2020-10-27 14:14:23,172 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 328 transitions. Word has length 46 [2020-10-27 14:14:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:23,173 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 328 transitions. [2020-10-27 14:14:23,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:14:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 328 transitions. [2020-10-27 14:14:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:14:23,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:23,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:23,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:14:23,175 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash 775625606, now seen corresponding path program 1 times [2020-10-27 14:14:23,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:23,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897071973] [2020-10-27 14:14:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:23,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:23,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:23,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:23,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:26,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:28,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:28,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:14:28,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:14:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:14:28,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:14:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:14:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:14:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:28,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:28,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:28,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:28,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:28,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:14:28,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:28,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:28,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:28,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:28,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:28,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:14:28,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:28,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-27 14:14:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:28,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:28,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:28,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:28,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:28,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:28,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:28,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:14:28,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-27 14:14:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:28,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:28,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:28,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:28,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:28,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:14:28,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:28,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897071973] [2020-10-27 14:14:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:14:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047676534] [2020-10-27 14:14:28,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:14:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:14:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:14:28,781 INFO L87 Difference]: Start difference. First operand 260 states and 328 transitions. Second operand 11 states. [2020-10-27 14:14:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:30,343 INFO L93 Difference]: Finished difference Result 356 states and 454 transitions. [2020-10-27 14:14:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:14:30,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-27 14:14:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:30,349 INFO L225 Difference]: With dead ends: 356 [2020-10-27 14:14:30,350 INFO L226 Difference]: Without dead ends: 318 [2020-10-27 14:14:30,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:14:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-27 14:14:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 271. [2020-10-27 14:14:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-27 14:14:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 341 transitions. [2020-10-27 14:14:30,403 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 341 transitions. Word has length 48 [2020-10-27 14:14:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:30,403 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 341 transitions. [2020-10-27 14:14:30,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:14:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 341 transitions. [2020-10-27 14:14:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:14:30,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:30,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:30,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:14:30,406 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1843645907, now seen corresponding path program 6 times [2020-10-27 14:14:30,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:30,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946508581] [2020-10-27 14:14:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:30,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:31,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:32,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:32,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:33,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:33,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:14:35,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:14:35,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:14:35,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:35,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:35,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:35,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:35,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:35,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:35,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-27 14:14:35,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:14:35,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:35,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:14:35,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946508581] [2020-10-27 14:14:35,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:35,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:14:35,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682004740] [2020-10-27 14:14:35,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:14:35,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:14:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:14:35,787 INFO L87 Difference]: Start difference. First operand 271 states and 341 transitions. Second operand 13 states. [2020-10-27 14:14:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:36,822 INFO L93 Difference]: Finished difference Result 296 states and 373 transitions. [2020-10-27 14:14:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:14:36,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-27 14:14:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:36,826 INFO L225 Difference]: With dead ends: 296 [2020-10-27 14:14:36,826 INFO L226 Difference]: Without dead ends: 286 [2020-10-27 14:14:36,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:14:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-27 14:14:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 277. [2020-10-27 14:14:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 14:14:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 349 transitions. [2020-10-27 14:14:36,889 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 349 transitions. Word has length 48 [2020-10-27 14:14:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:36,889 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 349 transitions. [2020-10-27 14:14:36,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:14:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 349 transitions. [2020-10-27 14:14:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:14:36,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:36,892 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-10-27 14:14:36,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:14:36,892 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 201023736, now seen corresponding path program 6 times [2020-10-27 14:14:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:36,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993048832] [2020-10-27 14:14:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:36,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:37,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:37,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:37,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:38,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:38,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:39,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:41,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:41,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:14:41,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:14:41,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:14:41,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:14:41,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:14:41,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:14:41,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:42,333 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2020-10-27 14:14:42,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:42,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:42,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:42,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:42,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:42,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:42,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:42,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:42,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:42,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:42,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:42,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:42,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 14:14:42,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:42,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 14:14:42,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:14:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:42,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:14:42,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:43,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993048832] [2020-10-27 14:14:43,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:43,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:14:43,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466577312] [2020-10-27 14:14:43,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:14:43,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:14:43,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:14:43,219 INFO L87 Difference]: Start difference. First operand 277 states and 349 transitions. Second operand 18 states. [2020-10-27 14:14:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:45,885 INFO L93 Difference]: Finished difference Result 448 states and 570 transitions. [2020-10-27 14:14:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:14:45,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-27 14:14:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:45,890 INFO L225 Difference]: With dead ends: 448 [2020-10-27 14:14:45,890 INFO L226 Difference]: Without dead ends: 335 [2020-10-27 14:14:45,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:14:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-27 14:14:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 290. [2020-10-27 14:14:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-27 14:14:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 365 transitions. [2020-10-27 14:14:45,971 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 365 transitions. Word has length 49 [2020-10-27 14:14:45,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:45,975 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 365 transitions. [2020-10-27 14:14:45,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:14:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 365 transitions. [2020-10-27 14:14:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:14:45,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:45,978 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-10-27 14:14:45,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:14:45,980 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:45,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:45,981 INFO L82 PathProgramCache]: Analyzing trace with hash -163285778, now seen corresponding path program 7 times [2020-10-27 14:14:45,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:45,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061088765] [2020-10-27 14:14:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:46,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:46,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:47,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:48,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:51,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:51,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:14:51,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:14:51,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:14:51,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:14:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:14:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:14:51,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:51,458 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-27 14:14:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:51,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:51,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:51,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:51,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:14:51,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:51,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:51,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:51,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:51,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:51,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:51,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 14:14:51,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:51,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-27 14:14:51,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:14:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:51,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:14:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:14:52,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061088765] [2020-10-27 14:14:52,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:52,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:14:52,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945666777] [2020-10-27 14:14:52,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:14:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:14:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:14:52,119 INFO L87 Difference]: Start difference. First operand 290 states and 365 transitions. Second operand 18 states. [2020-10-27 14:14:52,446 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 14:14:52,693 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 14:14:53,001 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 14:14:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:14:55,225 INFO L93 Difference]: Finished difference Result 462 states and 585 transitions. [2020-10-27 14:14:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:14:55,226 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-27 14:14:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:14:55,229 INFO L225 Difference]: With dead ends: 462 [2020-10-27 14:14:55,229 INFO L226 Difference]: Without dead ends: 346 [2020-10-27 14:14:55,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:14:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-27 14:14:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 301. [2020-10-27 14:14:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 14:14:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 378 transitions. [2020-10-27 14:14:55,286 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 378 transitions. Word has length 49 [2020-10-27 14:14:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:14:55,286 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 378 transitions. [2020-10-27 14:14:55,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:14:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 378 transitions. [2020-10-27 14:14:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:14:55,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:14:55,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:14:55,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:14:55,289 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:14:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:14:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1392532852, now seen corresponding path program 2 times [2020-10-27 14:14:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:14:55,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795958662] [2020-10-27 14:14:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:14:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:56,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3305 [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:14:58,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:14:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:14:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:14:58,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:14:58,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:14:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:14:58,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 14:14:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:14:58,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 14:14:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:14:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:14:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:14:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:14:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:14:58,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:14:58,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:14:58,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:14:58,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:14:58,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:14:58,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:14:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:14:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 14:14:58,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:14:58,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:14:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:14:58,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795958662] [2020-10-27 14:14:58,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:14:58,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:14:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884559891] [2020-10-27 14:14:58,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:14:58,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:14:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:14:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:14:58,947 INFO L87 Difference]: Start difference. First operand 301 states and 378 transitions. Second operand 12 states. [2020-10-27 14:15:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:15:00,197 INFO L93 Difference]: Finished difference Result 435 states and 554 transitions. [2020-10-27 14:15:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:15:00,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-27 14:15:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:15:00,201 INFO L225 Difference]: With dead ends: 435 [2020-10-27 14:15:00,201 INFO L226 Difference]: Without dead ends: 406 [2020-10-27 14:15:00,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:15:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-27 14:15:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 311. [2020-10-27 14:15:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-27 14:15:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 390 transitions. [2020-10-27 14:15:00,260 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 390 transitions. Word has length 51 [2020-10-27 14:15:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:15:00,261 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 390 transitions. [2020-10-27 14:15:00,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:15:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 390 transitions. [2020-10-27 14:15:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:15:00,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:15:00,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2020-10-27 14:15:00,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:15:00,263 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:15:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:15:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash -97966596, now seen corresponding path program 8 times [2020-10-27 14:15:00,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:15:00,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172968997] [2020-10-27 14:15:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:15:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:15:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:01,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:15:02,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking...