/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:59:39,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:59:39,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:59:39,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:59:39,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:59:39,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:59:39,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:59:39,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:59:39,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:59:39,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:59:39,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:59:39,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:59:39,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:59:39,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:59:39,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:59:39,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:59:39,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:59:39,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:59:39,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:59:39,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:59:39,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:59:39,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:59:39,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:59:39,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:59:39,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:59:39,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:59:39,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:59:39,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:59:39,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:59:39,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:59:39,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:59:39,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:59:39,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:59:39,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:59:39,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:59:39,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:59:39,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:59:39,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:59:39,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:59:39,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:59:39,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:59:39,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 04:59:39,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:59:39,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:59:39,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:59:39,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:59:39,805 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:59:39,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:59:39,806 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:59:39,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:59:39,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:59:39,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:59:39,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:59:39,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:59:39,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:59:39,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:59:39,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:59:39,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:59:39,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:59:39,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:59:39,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:59:39,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:59:39,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:59:39,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:59:39,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:59:39,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:59:39,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:59:39,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:59:39,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:59:39,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:59:39,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:59:39,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:59:40,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:59:40,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:59:40,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:59:40,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:59:40,174 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:59:40,175 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-10-14 04:59:40,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9a553fd7/4d49192adb3f4340bc0124a6390348df/FLAGa966d875d [2020-10-14 04:59:40,811 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:59:40,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-10-14 04:59:40,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9a553fd7/4d49192adb3f4340bc0124a6390348df/FLAGa966d875d [2020-10-14 04:59:41,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d9a553fd7/4d49192adb3f4340bc0124a6390348df [2020-10-14 04:59:41,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:59:41,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:59:41,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:59:41,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:59:41,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:59:41,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336ce4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41, skipping insertion in model container [2020-10-14 04:59:41,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:59:41,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:59:41,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:59:41,733 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:59:41,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:59:41,848 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:59:41,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41 WrapperNode [2020-10-14 04:59:41,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:59:41,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:59:41,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:59:41,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:59:41,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... [2020-10-14 04:59:41,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:59:41,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:59:41,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:59:41,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:59:41,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:59:42,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:59:42,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:59:42,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 04:59:42,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 04:59:42,003 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 04:59:42,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:59:42,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:59:42,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 04:59:42,004 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 04:59:42,004 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 04:59:42,004 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 04:59:42,004 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 04:59:42,005 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 04:59:42,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 04:59:42,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 04:59:42,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 04:59:42,005 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 04:59:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 04:59:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 04:59:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 04:59:42,006 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 04:59:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 04:59:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 04:59:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 04:59:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 04:59:42,007 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 04:59:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 04:59:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 04:59:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 04:59:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 04:59:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 04:59:42,008 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 04:59:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 04:59:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 04:59:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 04:59:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 04:59:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 04:59:42,009 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 04:59:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 04:59:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 04:59:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 04:59:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 04:59:42,010 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 04:59:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 04:59:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 04:59:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 04:59:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 04:59:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 04:59:42,011 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 04:59:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 04:59:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 04:59:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 04:59:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 04:59:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 04:59:42,012 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 04:59:42,013 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 04:59:42,014 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 04:59:42,015 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 04:59:42,015 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 04:59:42,015 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 04:59:42,015 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 04:59:42,015 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 04:59:42,015 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 04:59:42,016 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 04:59:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 04:59:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 04:59:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 04:59:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 04:59:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 04:59:42,017 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 04:59:42,018 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 04:59:42,019 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 04:59:42,020 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 04:59:42,021 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 04:59:42,021 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 04:59:42,021 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 04:59:42,021 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 04:59:42,021 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 04:59:42,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:59:42,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 04:59:42,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 04:59:42,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 04:59:42,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 04:59:42,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 04:59:42,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 04:59:42,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:59:42,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:59:42,366 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 04:59:42,734 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:59:42,734 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-14 04:59:42,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:59:42 BoogieIcfgContainer [2020-10-14 04:59:42,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:59:42,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:59:42,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:59:42,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:59:42,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:59:41" (1/3) ... [2020-10-14 04:59:42,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ae3357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:59:42, skipping insertion in model container [2020-10-14 04:59:42,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:59:41" (2/3) ... [2020-10-14 04:59:42,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ae3357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:59:42, skipping insertion in model container [2020-10-14 04:59:42,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:59:42" (3/3) ... [2020-10-14 04:59:42,749 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-10-14 04:59:42,758 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:59:42,766 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:59:42,781 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:59:42,803 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:59:42,803 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:59:42,803 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:59:42,803 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:59:42,803 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:59:42,804 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:59:42,804 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:59:42,804 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:59:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-14 04:59:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 04:59:42,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:42,832 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] [2020-10-14 04:59:42,833 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-10-14 04:59:42,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:42,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912588748] [2020-10-14 04:59:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:43,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 04:59:43,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 04:59:43,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-14 04:59:43,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:43,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 04:59:43,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:43,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 04:59:43,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:43,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:43,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:43,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 04:59:43,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:43,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:43,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:43,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:43,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:43,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:59:43,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912588748] [2020-10-14 04:59:43,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:59:43,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 04:59:43,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281353336] [2020-10-14 04:59:43,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 04:59:43,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 04:59:43,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 04:59:43,477 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-10-14 04:59:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:43,684 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-10-14 04:59:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 04:59:43,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-14 04:59:43,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:43,695 INFO L225 Difference]: With dead ends: 108 [2020-10-14 04:59:43,695 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 04:59:43,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 04:59:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 04:59:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 04:59:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 04:59:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-10-14 04:59:43,745 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-10-14 04:59:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:43,746 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-10-14 04:59:43,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 04:59:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-10-14 04:59:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 04:59:43,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:43,748 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] [2020-10-14 04:59:43,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:59:43,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-10-14 04:59:43,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:43,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581254599] [2020-10-14 04:59:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:43,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:43,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:43,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 04:59:43,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:59:43,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-14 04:59:43,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:43,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:43,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:59:43,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 04:59:43,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 04:59:43,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:44,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:44,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:44,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:44,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:44,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:44,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:44,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:44,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:44,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:44,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:59:44,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581254599] [2020-10-14 04:59:44,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:59:44,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 04:59:44,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922021473] [2020-10-14 04:59:44,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:59:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:59:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:59:44,036 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-10-14 04:59:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:44,212 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-10-14 04:59:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 04:59:44,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-14 04:59:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:44,217 INFO L225 Difference]: With dead ends: 75 [2020-10-14 04:59:44,217 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 04:59:44,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:59:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 04:59:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-14 04:59:44,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 04:59:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-10-14 04:59:44,244 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-10-14 04:59:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:44,244 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-10-14 04:59:44,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:59:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-10-14 04:59:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 04:59:44,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:44,248 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] [2020-10-14 04:59:44,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:59:44,249 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-10-14 04:59:44,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:44,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065624323] [2020-10-14 04:59:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:44,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 04:59:44,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 04:59:44,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-14 04:59:44,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:44,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 04:59:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 04:59:44,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 04:59:44,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:44,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:44,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:44,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:44,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:59:44,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:44,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:59:44,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065624323] [2020-10-14 04:59:44,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:59:44,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 04:59:44,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569988672] [2020-10-14 04:59:44,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:59:44,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:44,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:59:44,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:59:44,622 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-10-14 04:59:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:44,748 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-10-14 04:59:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 04:59:44,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-14 04:59:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:44,750 INFO L225 Difference]: With dead ends: 93 [2020-10-14 04:59:44,750 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 04:59:44,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:59:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 04:59:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 04:59:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 04:59:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-10-14 04:59:44,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-10-14 04:59:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:44,760 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-10-14 04:59:44,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:59:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-10-14 04:59:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 04:59:44,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:44,762 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] [2020-10-14 04:59:44,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 04:59:44,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-10-14 04:59:44,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:44,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455425976] [2020-10-14 04:59:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:44,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 04:59:44,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:44,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-14 04:59:44,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:44,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:59:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 04:59:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 04:59:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:44,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:44,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:44,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:44,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:44,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:44,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:44,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455425976] [2020-10-14 04:59:44,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:59:44,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 04:59:44,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635220749] [2020-10-14 04:59:44,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 04:59:44,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 04:59:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:59:44,905 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-10-14 04:59:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:45,113 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-10-14 04:59:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 04:59:45,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-14 04:59:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:45,115 INFO L225 Difference]: With dead ends: 82 [2020-10-14 04:59:45,115 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 04:59:45,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 04:59:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 04:59:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-10-14 04:59:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 04:59:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-10-14 04:59:45,124 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-10-14 04:59:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:45,125 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-10-14 04:59:45,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 04:59:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-10-14 04:59:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 04:59:45,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:45,127 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] [2020-10-14 04:59:45,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 04:59:45,127 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-10-14 04:59:45,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:45,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230471721] [2020-10-14 04:59:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:45,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:45,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:45,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 04:59:45,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:45,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-14 04:59:45,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:45,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:45,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:59:45,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 04:59:45,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 04:59:45,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:45,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:45,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:45,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:45,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:45,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:45,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:45,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:45,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:45,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:45,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230471721] [2020-10-14 04:59:45,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:59:45,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 04:59:45,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266156372] [2020-10-14 04:59:45,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 04:59:45,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 04:59:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:59:45,289 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-10-14 04:59:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:45,472 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-10-14 04:59:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 04:59:45,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-14 04:59:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:45,474 INFO L225 Difference]: With dead ends: 84 [2020-10-14 04:59:45,474 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 04:59:45,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 04:59:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 04:59:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-10-14 04:59:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 04:59:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-10-14 04:59:45,483 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-10-14 04:59:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:45,483 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-10-14 04:59:45,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 04:59:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-10-14 04:59:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 04:59:45,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:45,485 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] [2020-10-14 04:59:45,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 04:59:45,485 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-10-14 04:59:45,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:45,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749254025] [2020-10-14 04:59:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:45,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:45,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:45,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 04:59:45,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:45,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 04:59:45,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:45,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 04:59:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 04:59:45,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 04:59:45,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:45,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:45,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:45,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:45,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:59:45,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:45,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:45,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:45,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:45,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749254025] [2020-10-14 04:59:45,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:59:45,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 04:59:45,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986130665] [2020-10-14 04:59:45,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 04:59:45,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 04:59:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 04:59:45,650 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-10-14 04:59:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:45,897 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-10-14 04:59:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 04:59:45,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-14 04:59:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:45,899 INFO L225 Difference]: With dead ends: 84 [2020-10-14 04:59:45,900 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 04:59:45,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 04:59:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 04:59:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-10-14 04:59:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 04:59:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-10-14 04:59:45,918 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-10-14 04:59:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:45,919 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-10-14 04:59:45,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 04:59:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-10-14 04:59:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 04:59:45,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:45,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:45,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 04:59:45,926 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:45,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:45,927 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-10-14 04:59:45,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:45,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122713389] [2020-10-14 04:59:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:45,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:46,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:46,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 04:59:46,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:59:46,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-14 04:59:46,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:46,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:46,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 04:59:46,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 04:59:46,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 04:59:46,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:46,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:46,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:46,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:46,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:46,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 04:59:46,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:46,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:46,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:46,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:46,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:46,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122713389] [2020-10-14 04:59:46,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:46,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 04:59:46,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906425234] [2020-10-14 04:59:46,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 04:59:46,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 04:59:46,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:59:46,791 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 10 states. [2020-10-14 04:59:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:47,111 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-10-14 04:59:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 04:59:47,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-14 04:59:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:47,113 INFO L225 Difference]: With dead ends: 86 [2020-10-14 04:59:47,113 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 04:59:47,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:59:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 04:59:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-14 04:59:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 04:59:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2020-10-14 04:59:47,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 35 [2020-10-14 04:59:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:47,128 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2020-10-14 04:59:47,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 04:59:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2020-10-14 04:59:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 04:59:47,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:47,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:47,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 04:59:47,130 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-10-14 04:59:47,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:47,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569209724] [2020-10-14 04:59:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:47,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:47,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:47,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:47,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 04:59:47,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 04:59:47,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-14 04:59:47,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:47,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 04:59:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 04:59:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 04:59:47,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:47,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:47,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:47,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:47,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:47,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:47,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:47,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:47,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:47,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569209724] [2020-10-14 04:59:47,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:47,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 04:59:47,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43252910] [2020-10-14 04:59:47,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 04:59:47,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:47,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 04:59:47,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:59:47,659 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand 10 states. [2020-10-14 04:59:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:47,999 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2020-10-14 04:59:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 04:59:47,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-14 04:59:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:48,001 INFO L225 Difference]: With dead ends: 95 [2020-10-14 04:59:48,001 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 04:59:48,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:59:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 04:59:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-10-14 04:59:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 04:59:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2020-10-14 04:59:48,008 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 35 [2020-10-14 04:59:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:48,009 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2020-10-14 04:59:48,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 04:59:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2020-10-14 04:59:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 04:59:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:48,010 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] [2020-10-14 04:59:48,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 04:59:48,010 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1194290218, now seen corresponding path program 1 times [2020-10-14 04:59:48,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:48,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649813531] [2020-10-14 04:59:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:48,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:48,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:48,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:48,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 04:59:48,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 04:59:48,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-14 04:59:48,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:48,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:48,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 04:59:48,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 04:59:48,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 04:59:48,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:48,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:48,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:48,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:48,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:48,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:48,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:48,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649813531] [2020-10-14 04:59:48,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:48,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 04:59:48,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069937371] [2020-10-14 04:59:48,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 04:59:48,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 04:59:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:59:48,895 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand 10 states. [2020-10-14 04:59:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:49,442 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2020-10-14 04:59:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 04:59:49,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-14 04:59:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:49,444 INFO L225 Difference]: With dead ends: 94 [2020-10-14 04:59:49,445 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 04:59:49,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:59:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 04:59:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-10-14 04:59:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 04:59:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 105 transitions. [2020-10-14 04:59:49,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 105 transitions. Word has length 37 [2020-10-14 04:59:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:49,454 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 105 transitions. [2020-10-14 04:59:49,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 04:59:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 105 transitions. [2020-10-14 04:59:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 04:59:49,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:49,455 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:49,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 04:59:49,456 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:49,456 INFO L82 PathProgramCache]: Analyzing trace with hash -907951247, now seen corresponding path program 2 times [2020-10-14 04:59:49,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:49,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541273099] [2020-10-14 04:59:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:49,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:49,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:50,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:50,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:50,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 04:59:50,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 04:59:50,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-10-14 04:59:50,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:50,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 04:59:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 04:59:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 04:59:50,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:50,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:50,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:50,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:50,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:50,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:59:50,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:50,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:50,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:50,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:50,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:50,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:50,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541273099] [2020-10-14 04:59:50,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:50,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 04:59:50,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121454059] [2020-10-14 04:59:50,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 04:59:50,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 04:59:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:59:50,866 INFO L87 Difference]: Start difference. First operand 78 states and 105 transitions. Second operand 10 states. [2020-10-14 04:59:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:51,298 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-10-14 04:59:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 04:59:51,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-14 04:59:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:51,300 INFO L225 Difference]: With dead ends: 96 [2020-10-14 04:59:51,300 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 04:59:51,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:59:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 04:59:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-10-14 04:59:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 04:59:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-10-14 04:59:51,306 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-10-14 04:59:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:51,307 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-10-14 04:59:51,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 04:59:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-10-14 04:59:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 04:59:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:51,308 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:51,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 04:59:51,308 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 1 times [2020-10-14 04:59:51,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:51,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903325094] [2020-10-14 04:59:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:51,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:51,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:51,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 04:59:51,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:51,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-14 04:59:51,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:51,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:51,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 04:59:51,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 04:59:51,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 04:59:51,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:51,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:51,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:51,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:51,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:51,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:51,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:59:51,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:51,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:51,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:51,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:51,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903325094] [2020-10-14 04:59:51,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:51,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 04:59:51,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454722242] [2020-10-14 04:59:51,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 04:59:51,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:51,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 04:59:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 04:59:51,608 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-10-14 04:59:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:51,999 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-10-14 04:59:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 04:59:52,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-14 04:59:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:52,001 INFO L225 Difference]: With dead ends: 94 [2020-10-14 04:59:52,001 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 04:59:52,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:59:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 04:59:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-10-14 04:59:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 04:59:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-10-14 04:59:52,006 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-10-14 04:59:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:52,007 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-10-14 04:59:52,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 04:59:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-10-14 04:59:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 04:59:52,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:52,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:52,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 04:59:52,009 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-10-14 04:59:52,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:52,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84817657] [2020-10-14 04:59:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:52,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:52,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:52,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 04:59:52,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:52,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-14 04:59:52,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:52,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:52,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 04:59:52,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 04:59:52,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 04:59:52,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:52,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:52,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:52,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:52,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:52,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 04:59:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:52,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:52,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:52,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:52,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84817657] [2020-10-14 04:59:52,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:52,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 04:59:52,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775874386] [2020-10-14 04:59:52,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 04:59:52,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 04:59:52,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 04:59:52,412 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2020-10-14 04:59:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:52,678 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2020-10-14 04:59:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 04:59:52,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-14 04:59:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:52,680 INFO L225 Difference]: With dead ends: 92 [2020-10-14 04:59:52,680 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 04:59:52,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 04:59:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 04:59:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-10-14 04:59:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 04:59:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2020-10-14 04:59:52,689 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 39 [2020-10-14 04:59:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:52,690 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2020-10-14 04:59:52,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 04:59:52,691 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2020-10-14 04:59:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 04:59:52,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:52,692 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] [2020-10-14 04:59:52,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 04:59:52,692 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:52,692 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-10-14 04:59:52,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:52,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019964764] [2020-10-14 04:59:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:52,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:52,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:52,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 04:59:52,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:52,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-14 04:59:52,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:52,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 04:59:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 04:59:52,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 04:59:52,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:53,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:53,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:53,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:53,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:53,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:59:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:53,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:53,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:53,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:59:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:53,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019964764] [2020-10-14 04:59:53,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:53,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 04:59:53,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473758193] [2020-10-14 04:59:53,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 04:59:53,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:53,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 04:59:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 04:59:53,052 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand 11 states. [2020-10-14 04:59:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:53,429 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-10-14 04:59:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 04:59:53,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-14 04:59:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:53,431 INFO L225 Difference]: With dead ends: 86 [2020-10-14 04:59:53,431 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 04:59:53,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 04:59:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 04:59:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-14 04:59:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 04:59:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-10-14 04:59:53,438 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 39 [2020-10-14 04:59:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:53,438 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-10-14 04:59:53,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 04:59:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-10-14 04:59:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 04:59:53,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:53,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:53,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 04:59:53,440 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 2 times [2020-10-14 04:59:53,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:53,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898009024] [2020-10-14 04:59:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:53,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:53,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:53,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 04:59:53,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:53,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-14 04:59:53,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:53,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:53,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 04:59:53,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 04:59:53,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 04:59:53,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:53,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:59:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:59:53,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:59:53,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:59:53,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:59:53,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:59:53,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 04:59:53,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:59:53,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:59:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:59:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:59:53,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:59:53,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 04:59:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 04:59:53,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898009024] [2020-10-14 04:59:53,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 04:59:53,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 04:59:53,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470494944] [2020-10-14 04:59:53,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 04:59:53,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:59:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 04:59:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 04:59:53,972 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 12 states. [2020-10-14 04:59:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:59:54,539 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-10-14 04:59:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 04:59:54,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-14 04:59:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:59:54,541 INFO L225 Difference]: With dead ends: 118 [2020-10-14 04:59:54,541 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 04:59:54,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 04:59:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 04:59:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2020-10-14 04:59:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 04:59:54,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2020-10-14 04:59:54,547 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 41 [2020-10-14 04:59:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:59:54,547 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2020-10-14 04:59:54,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 04:59:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2020-10-14 04:59:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 04:59:54,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:59:54,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:59:54,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 04:59:54,549 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:59:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:59:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-10-14 04:59:54,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:59:54,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74956526] [2020-10-14 04:59:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:59:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 04:59:54,565 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 04:59:54,565 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 04:59:54,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 04:59:54,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:59:54 BoogieIcfgContainer [2020-10-14 04:59:54,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 04:59:54,591 INFO L168 Benchmark]: Toolchain (without parser) took 13423.08 ms. Allocated memory was 147.3 MB in the beginning and 415.8 MB in the end (delta: 268.4 MB). Free memory was 102.3 MB in the beginning and 193.9 MB in the end (delta: -91.6 MB). Peak memory consumption was 176.8 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:54,592 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 04:59:54,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.30 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 101.8 MB in the beginning and 170.0 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:54,593 INFO L168 Benchmark]: Boogie Preprocessor took 79.18 ms. Allocated memory is still 204.5 MB. Free memory was 170.0 MB in the beginning and 166.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:54,594 INFO L168 Benchmark]: RCFGBuilder took 811.01 ms. Allocated memory is still 204.5 MB. Free memory was 166.3 MB in the beginning and 109.8 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:54,595 INFO L168 Benchmark]: TraceAbstraction took 11847.34 ms. Allocated memory was 204.5 MB in the beginning and 415.8 MB in the end (delta: 211.3 MB). Free memory was 108.8 MB in the beginning and 193.9 MB in the end (delta: -85.1 MB). Peak memory consumption was 126.2 MB. Max. memory is 7.1 GB. [2020-10-14 04:59:54,598 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 680.30 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 101.8 MB in the beginning and 170.0 MB in the end (delta: -68.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.18 ms. Allocated memory is still 204.5 MB. Free memory was 170.0 MB in the beginning and 166.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 811.01 ms. Allocated memory is still 204.5 MB. Free memory was 166.3 MB in the beginning and 109.8 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11847.34 ms. Allocated memory was 204.5 MB in the beginning and 415.8 MB in the end (delta: 211.3 MB). Free memory was 108.8 MB in the beginning and 193.9 MB in the end (delta: -85.1 MB). Peak memory consumption was 126.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.7s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 797 SDtfs, 457 SDslu, 2712 SDs, 0 SdLazy, 2485 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 125 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 518 NumberOfCodeBlocks, 518 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 463 ConstructedInterpolants, 0 QuantifiedInterpolants, 92036 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 24/62 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...