/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:36:07,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:36:07,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:36:07,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:36:07,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:36:07,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:36:07,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:36:07,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:36:07,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:36:07,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:36:07,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:36:07,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:36:07,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:36:07,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:36:07,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:36:07,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:36:07,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:36:07,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:36:07,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:36:07,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:36:07,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:36:07,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:36:07,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:36:07,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:36:07,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:36:07,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:36:07,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:36:07,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:36:07,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:36:07,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:36:07,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:36:07,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:36:07,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:36:07,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:36:07,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:36:07,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:36:07,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:36:07,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:36:07,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:36:07,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:36:07,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:36:07,510 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 [2020-09-25 14:36:07,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:36:07,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:36:07,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:36:07,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:36:07,561 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:36:07,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:36:07,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:36:07,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:36:07,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:36:07,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:36:07,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:36:07,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:36:07,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:36:07,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:36:07,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:36:07,565 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:36:07,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:36:07,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:36:07,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:36:07,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:36:07,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:36:07,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:36:07,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:36:07,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:36:07,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:36:07,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:36:07,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:36:07,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:36:07,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:36:07,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:36:08,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:36:08,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:36:08,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:36:08,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:36:08,042 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:36:08,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 14:36:08,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b5f9bf33/3a5c974404744d1dbaaa31e06a050844/FLAG3fe4efeba [2020-09-25 14:36:08,772 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:36:08,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 14:36:08,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b5f9bf33/3a5c974404744d1dbaaa31e06a050844/FLAG3fe4efeba [2020-09-25 14:36:09,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b5f9bf33/3a5c974404744d1dbaaa31e06a050844 [2020-09-25 14:36:09,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:36:09,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:36:09,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:36:09,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:36:09,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:36:09,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424d9305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09, skipping insertion in model container [2020-09-25 14:36:09,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:36:09,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:36:09,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:36:09,635 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:36:09,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:36:09,746 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:36:09,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09 WrapperNode [2020-09-25 14:36:09,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:36:09,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:36:09,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:36:09,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:36:09,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (1/1) ... [2020-09-25 14:36:09,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:36:09,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:36:09,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:36:09,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:36:09,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (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 [2020-09-25 14:36:09,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:36:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:36:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 14:36:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 14:36:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 14:36:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-25 14:36:09,907 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-25 14:36:09,908 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-25 14:36:09,908 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:36:09,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:36:09,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:36:09,908 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 14:36:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 14:36:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 14:36:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 14:36:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 14:36:09,909 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 14:36:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 14:36:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 14:36:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 14:36:09,910 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 14:36:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 14:36:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 14:36:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 14:36:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 14:36:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 14:36:09,911 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 14:36:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 14:36:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 14:36:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 14:36:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 14:36:09,912 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 14:36:09,913 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 14:36:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 14:36:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 14:36:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 14:36:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 14:36:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 14:36:09,914 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 14:36:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 14:36:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 14:36:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 14:36:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 14:36:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 14:36:09,915 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 14:36:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 14:36:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 14:36:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 14:36:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 14:36:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 14:36:09,916 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 14:36:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 14:36:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 14:36:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 14:36:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 14:36:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 14:36:09,917 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 14:36:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 14:36:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 14:36:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 14:36:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 14:36:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 14:36:09,918 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 14:36:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 14:36:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 14:36:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 14:36:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:36:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 14:36:09,919 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 14:36:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 14:36:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:36:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 14:36:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 14:36:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 14:36:09,920 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 14:36:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 14:36:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 14:36:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 14:36:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 14:36:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 14:36:09,921 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 14:36:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 14:36:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 14:36:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 14:36:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 14:36:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 14:36:09,922 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 14:36:09,923 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 14:36:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 14:36:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 14:36:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 14:36:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 14:36:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 14:36:09,924 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 14:36:09,925 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 14:36:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 14:36:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 14:36:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 14:36:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 14:36:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-25 14:36:09,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 14:36:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 14:36:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-25 14:36:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 14:36:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-25 14:36:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:36:09,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:36:09,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:36:09,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:36:10,319 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 14:36:10,494 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:36:10,495 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 14:36:10,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:36:10 BoogieIcfgContainer [2020-09-25 14:36:10,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:36:10,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:36:10,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:36:10,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:36:10,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:36:09" (1/3) ... [2020-09-25 14:36:10,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9e2753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:36:10, skipping insertion in model container [2020-09-25 14:36:10,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:09" (2/3) ... [2020-09-25 14:36:10,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9e2753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:36:10, skipping insertion in model container [2020-09-25 14:36:10,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:36:10" (3/3) ... [2020-09-25 14:36:10,512 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-25 14:36:10,525 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:36:10,536 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:36:10,559 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:36:10,592 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:36:10,593 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:36:10,593 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:36:10,593 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:36:10,593 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:36:10,594 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:36:10,594 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:36:10,594 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:36:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 14:36:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 14:36:10,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:10,635 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] [2020-09-25 14:36:10,635 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-09-25 14:36:10,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:10,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476382593] [2020-09-25 14:36:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:10,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:10,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:11,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:11,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 14:36:11,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:36:11,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-09-25 14:36:11,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:11,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:36:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:36:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:36:11,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:36:11,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:11,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:11,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:11,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:11,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:11,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 14:36:11,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:11,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:11,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:11,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 14:36:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:11,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:11,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:11,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:11,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-25 14:36:11,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:11,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:36:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:11,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:36:11,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:11,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 14:36:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:11,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:11,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:11,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:11,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:11,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 14:36:11,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:11,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 14:36:11,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:11,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:36:11,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476382593] [2020-09-25 14:36:11,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:36:11,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 14:36:11,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707651946] [2020-09-25 14:36:11,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:36:11,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:36:11,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:36:11,578 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 7 states. [2020-09-25 14:36:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:12,142 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2020-09-25 14:36:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 14:36:12,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 14:36:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:12,159 INFO L225 Difference]: With dead ends: 186 [2020-09-25 14:36:12,160 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 14:36:12,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:36:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 14:36:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-25 14:36:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 14:36:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-09-25 14:36:12,234 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 29 [2020-09-25 14:36:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:12,234 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-09-25 14:36:12,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:36:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-09-25 14:36:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 14:36:12,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:12,238 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:12,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:36:12,239 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:12,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2090477770, now seen corresponding path program 1 times [2020-09-25 14:36:12,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:12,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446983366] [2020-09-25 14:36:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:12,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:12,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:12,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:12,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:12,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:13,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:15,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:15,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 14:36:15,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:36:15,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3006 [2020-09-25 14:36:15,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:15,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:36:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 14:36:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 14:36:15,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:15,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:15,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:15,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:15,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:15,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:15,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:36:15,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:15,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:15,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:15,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 14:36:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:15,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:15,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:15,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:15,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:15,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 14:36:15,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:15,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:36:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:36:15,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:15,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:36:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:15,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:15,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:15,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:15,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:15,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 14:36:15,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:15,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:15,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:15,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 14:36:15,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:15,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:36:15,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446983366] [2020-09-25 14:36:15,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:36:15,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 14:36:15,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205005313] [2020-09-25 14:36:15,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 14:36:15,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 14:36:15,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:36:15,471 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 8 states. [2020-09-25 14:36:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:15,842 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-09-25 14:36:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:36:15,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-25 14:36:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:15,847 INFO L225 Difference]: With dead ends: 122 [2020-09-25 14:36:15,847 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 14:36:15,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 14:36:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 14:36:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2020-09-25 14:36:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 14:36:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-09-25 14:36:15,861 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 41 [2020-09-25 14:36:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:15,861 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-09-25 14:36:15,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 14:36:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-09-25 14:36:15,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 14:36:15,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:15,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:15,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:36:15,864 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1545332509, now seen corresponding path program 1 times [2020-09-25 14:36:15,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:15,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892645214] [2020-09-25 14:36:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:15,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:15,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:15,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:17,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:20,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:20,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 14:36:20,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:36:20,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 14:36:20,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:20,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:20,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:36:20,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:36:20,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 14:36:20,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:20,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:20,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:20,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:20,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:36:20,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:20,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:20,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:20,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:20,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:20,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 14:36:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:20,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:21,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:21,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 14:36:21,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:21,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 14:36:21,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:21,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:36:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:36:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:21,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-25 14:36:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:21,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:21,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:21,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:21,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:21,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 14:36:21,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:21,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 14:36:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:36:21,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892645214] [2020-09-25 14:36:21,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:21,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 14:36:21,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413995024] [2020-09-25 14:36:21,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 14:36:21,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 14:36:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:36:21,114 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-09-25 14:36:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:21,495 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-09-25 14:36:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 14:36:21,495 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-09-25 14:36:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:21,497 INFO L225 Difference]: With dead ends: 130 [2020-09-25 14:36:21,497 INFO L226 Difference]: Without dead ends: 110 [2020-09-25 14:36:21,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 14:36:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-25 14:36:21,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2020-09-25 14:36:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 14:36:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2020-09-25 14:36:21,529 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 42 [2020-09-25 14:36:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:21,529 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2020-09-25 14:36:21,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 14:36:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2020-09-25 14:36:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 14:36:21,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:21,532 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:21,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:36:21,532 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1544593977, now seen corresponding path program 1 times [2020-09-25 14:36:21,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:21,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222485162] [2020-09-25 14:36:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:21,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:21,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:21,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:21,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:22,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:22,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 14:36:22,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:36:22,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-09-25 14:36:22,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:22,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:36:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:36:22,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 14:36:22,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:22,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:22,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:22,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:22,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:36:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:22,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:22,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:22,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:22,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:22,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:22,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 14:36:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:22,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:22,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:22,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:22,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:22,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 14:36:22,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:22,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:36:22,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:22,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:36:22,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:22,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-25 14:36:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:22,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:22,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:22,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:22,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:36:22,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:22,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:22,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 14:36:22,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:22,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:36:22,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222485162] [2020-09-25 14:36:22,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:36:22,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 14:36:22,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959990279] [2020-09-25 14:36:22,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 14:36:22,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:22,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 14:36:22,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:36:22,507 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand 9 states. [2020-09-25 14:36:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:22,914 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-09-25 14:36:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 14:36:22,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 14:36:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:22,917 INFO L225 Difference]: With dead ends: 115 [2020-09-25 14:36:22,917 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 14:36:22,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-09-25 14:36:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 14:36:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-09-25 14:36:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 14:36:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-09-25 14:36:22,947 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 43 [2020-09-25 14:36:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:22,948 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-09-25 14:36:22,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 14:36:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-09-25 14:36:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 14:36:22,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:22,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:22,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:36:22,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1118211705, now seen corresponding path program 1 times [2020-09-25 14:36:22,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:22,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228077894] [2020-09-25 14:36:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:22,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:23,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:23,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:23,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:24,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:25,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:27,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:27,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 14:36:27,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 14:36:27,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:36:27,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:27,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 14:36:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 14:36:27,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 14:36:27,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:28,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:28,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:28,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:28,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:36:28,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:28,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:28,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:28,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:28,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 14:36:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:28,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:28,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 14:36:28,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:28,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 14:36:28,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:28,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:36:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:28,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:36:28,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:28,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-25 14:36:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:28,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:28,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:28,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:28,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:36:28,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:28,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 14:36:28,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:28,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:36:28,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228077894] [2020-09-25 14:36:28,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:28,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 14:36:28,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098597725] [2020-09-25 14:36:28,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 14:36:28,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 14:36:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-25 14:36:28,219 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 10 states. [2020-09-25 14:36:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:28,572 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-09-25 14:36:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 14:36:28,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-09-25 14:36:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:28,574 INFO L225 Difference]: With dead ends: 123 [2020-09-25 14:36:28,574 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 14:36:28,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-25 14:36:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 14:36:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2020-09-25 14:36:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 14:36:28,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-09-25 14:36:28,586 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 50 [2020-09-25 14:36:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:28,587 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-09-25 14:36:28,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 14:36:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-09-25 14:36:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 14:36:28,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:28,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:28,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:36:28,589 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:28,589 INFO L82 PathProgramCache]: Analyzing trace with hash 222909824, now seen corresponding path program 2 times [2020-09-25 14:36:28,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:28,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390654690] [2020-09-25 14:36:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:28,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:28,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:29,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:33,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 14:36:33,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 14:36:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 14:36:33,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:33,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:36:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 14:36:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 14:36:33,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:33,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:33,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:33,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:33,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:33,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:36:33,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:33,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:33,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 14:36:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:33,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:33,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 14:36:33,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:36:33,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-09-25 14:36:33,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:33,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:33,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:36:33,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:33,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 14:36:33,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:34,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 14:36:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:34,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:34,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:34,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 14:36:34,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:34,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 14:36:34,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:34,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:36:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:34,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:36:34,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 14:36:34,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390654690] [2020-09-25 14:36:34,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:36:34,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 14:36:34,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250351811] [2020-09-25 14:36:34,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 14:36:34,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:34,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 14:36:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:36:34,118 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 11 states. [2020-09-25 14:36:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:34,753 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2020-09-25 14:36:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 14:36:34,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-09-25 14:36:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:34,756 INFO L225 Difference]: With dead ends: 90 [2020-09-25 14:36:34,756 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 14:36:34,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-09-25 14:36:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 14:36:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-09-25 14:36:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 14:36:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2020-09-25 14:36:34,779 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 51 [2020-09-25 14:36:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:34,780 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2020-09-25 14:36:34,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 14:36:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2020-09-25 14:36:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 14:36:34,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:34,784 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:34,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 14:36:34,784 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:34,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:34,785 INFO L82 PathProgramCache]: Analyzing trace with hash -893250737, now seen corresponding path program 1 times [2020-09-25 14:36:34,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:34,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671769766] [2020-09-25 14:36:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:34,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:34,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:34,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:35,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:35,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:36,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:39,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:39,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 14:36:39,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 14:36:39,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 14:36:39,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:39,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:36:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:36:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 14:36:39,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:39,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:39,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:39,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:39,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:36:39,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:39,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:39,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 14:36:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:39,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:39,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:39,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 14:36:39,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:39,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-25 14:36:39,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:39,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:39,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:36:39,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:39,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 14:36:39,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:40,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 14:36:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:40,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:40,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:40,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 14:36:40,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:40,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 14:36:40,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:40,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:40,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 14:36:40,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:40,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:36:40,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671769766] [2020-09-25 14:36:40,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:40,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 14:36:40,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877346806] [2020-09-25 14:36:40,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 14:36:40,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:40,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 14:36:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:36:40,108 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 11 states. [2020-09-25 14:36:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:40,513 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2020-09-25 14:36:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 14:36:40,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-09-25 14:36:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:40,515 INFO L225 Difference]: With dead ends: 133 [2020-09-25 14:36:40,515 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 14:36:40,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-09-25 14:36:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 14:36:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-25 14:36:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 14:36:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-09-25 14:36:40,533 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 58 [2020-09-25 14:36:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:40,533 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-09-25 14:36:40,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 14:36:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-09-25 14:36:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 14:36:40,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:40,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:40,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 14:36:40,535 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1249187435, now seen corresponding path program 1 times [2020-09-25 14:36:40,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:40,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458447782] [2020-09-25 14:36:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:40,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:41,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:41,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:41,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 14:36:41,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:36:41,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-09-25 14:36:41,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:41,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:36:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:36:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 14:36:41,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:41,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:41,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:41,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:41,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:41,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:36:41,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:41,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:41,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-25 14:36:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:42,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 14:36:42,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:42,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 14:36:42,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:42,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:42,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:36:42,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:42,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:36:42,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 14:36:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:42,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:42,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 14:36:42,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:42,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 14:36:42,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:42,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 14:36:42,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:42,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:36:42,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458447782] [2020-09-25 14:36:42,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:42,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 14:36:42,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910141930] [2020-09-25 14:36:42,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 14:36:42,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 14:36:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:36:42,127 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 11 states. [2020-09-25 14:36:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:42,640 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2020-09-25 14:36:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 14:36:42,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-09-25 14:36:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:42,643 INFO L225 Difference]: With dead ends: 151 [2020-09-25 14:36:42,644 INFO L226 Difference]: Without dead ends: 130 [2020-09-25 14:36:42,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-09-25 14:36:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-25 14:36:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2020-09-25 14:36:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-25 14:36:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-09-25 14:36:42,660 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 59 [2020-09-25 14:36:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:42,660 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-09-25 14:36:42,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 14:36:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-09-25 14:36:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 14:36:42,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:42,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:42,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 14:36:42,663 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash 167872953, now seen corresponding path program 1 times [2020-09-25 14:36:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:42,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880660608] [2020-09-25 14:36:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:42,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:43,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:43,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:44,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:47,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:47,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 14:36:47,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 14:36:47,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:36:47,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:47,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 14:36:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 14:36:47,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 14:36:47,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:47,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:47,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:47,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:47,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 14:36:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:47,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:47,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:47,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 14:36:47,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:47,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-25 14:36:47,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:47,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:36:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:47,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 14:36:47,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:47,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 14:36:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:47,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:47,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:47,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 14:36:47,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:47,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 14:36:47,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:47,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:47,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 14:36:47,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:47,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 14:36:47,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880660608] [2020-09-25 14:36:47,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:47,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 14:36:47,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689801000] [2020-09-25 14:36:47,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 14:36:47,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 14:36:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 14:36:47,978 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 12 states. [2020-09-25 14:36:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:48,414 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-09-25 14:36:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 14:36:48,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-09-25 14:36:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:48,417 INFO L225 Difference]: With dead ends: 154 [2020-09-25 14:36:48,417 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 14:36:48,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-25 14:36:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 14:36:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-09-25 14:36:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-25 14:36:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2020-09-25 14:36:48,430 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 66 [2020-09-25 14:36:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:48,430 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2020-09-25 14:36:48,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 14:36:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2020-09-25 14:36:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 14:36:48,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:48,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:48,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 14:36:48,432 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1325114446, now seen corresponding path program 2 times [2020-09-25 14:36:48,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:48,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633402614] [2020-09-25 14:36:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:48,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:48,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:48,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:49,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:53,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:53,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 14:36:53,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 14:36:53,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 14:36:53,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:53,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:53,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 14:36:53,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 14:36:53,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 14:36:53,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:53,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:53,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:53,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:53,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:36:53,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:53,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:36:53,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:53,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:53,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:53,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:53,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:53,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 14:36:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:53,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:53,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 14:36:53,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-25 14:36:53,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:53,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:53,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:36:53,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 14:36:53,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 14:36:53,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:36:53,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-25 14:36:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:53,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:53,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:53,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 14:36:53,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:53,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:36:53,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:53,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:53,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:36:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 14:36:53,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:36:53,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 14:36:53,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633402614] [2020-09-25 14:36:53,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:53,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 14:36:53,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170003330] [2020-09-25 14:36:53,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 14:36:53,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 14:36:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-09-25 14:36:53,836 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 14 states. [2020-09-25 14:36:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:54,484 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2020-09-25 14:36:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 14:36:54,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-09-25 14:36:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:54,486 INFO L225 Difference]: With dead ends: 163 [2020-09-25 14:36:54,487 INFO L226 Difference]: Without dead ends: 142 [2020-09-25 14:36:54,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2020-09-25 14:36:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-25 14:36:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2020-09-25 14:36:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-25 14:36:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2020-09-25 14:36:54,499 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 67 [2020-09-25 14:36:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:54,500 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2020-09-25 14:36:54,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 14:36:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2020-09-25 14:36:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 14:36:54,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:54,507 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:54,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 14:36:54,507 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash -215716543, now seen corresponding path program 2 times [2020-09-25 14:36:54,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:54,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923625804] [2020-09-25 14:36:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:54,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:54,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:54,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:54,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking...