/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:32:19,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:32:19,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:32:19,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:32:19,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:32:19,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:32:19,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:32:19,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:32:19,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:32:19,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:32:19,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:32:19,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:32:19,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:32:19,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:32:19,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:32:19,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:32:19,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:32:19,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:32:19,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:32:19,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:32:19,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:32:19,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:32:19,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:32:19,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:32:19,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:32:19,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:32:19,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:32:19,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:32:19,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:32:19,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:32:19,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:32:19,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:32:19,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:32:19,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:32:19,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:32:19,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:32:19,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:32:19,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:32:19,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:32:19,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:32:19,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:32:19,721 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 23:32:19,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:32:19,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:32:19,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:32:19,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:32:19,758 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:32:19,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:32:19,758 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:32:19,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:32:19,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:32:19,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:32:19,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:32:19,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:32:19,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:32:19,761 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:32:19,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:32:19,761 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:32:19,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:32:19,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:32:19,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:32:19,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:32:19,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:32:19,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:32:19,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:32:19,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:32:19,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:32:19,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:32:19,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:32:19,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:32:19,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:32:19,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:32:20,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:32:20,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:32:20,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:32:20,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:32:20,068 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:32:20,068 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-14 23:32:20,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeea47553/276f3ebc3a03490fbee61af4cf64e8a7/FLAG4f2cdff3d [2020-10-14 23:32:20,617 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:32:20,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-14 23:32:20,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeea47553/276f3ebc3a03490fbee61af4cf64e8a7/FLAG4f2cdff3d [2020-10-14 23:32:20,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eeea47553/276f3ebc3a03490fbee61af4cf64e8a7 [2020-10-14 23:32:20,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:32:20,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:32:20,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:32:20,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:32:20,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:32:20,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:32:20" (1/1) ... [2020-10-14 23:32:20,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396f3c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:20, skipping insertion in model container [2020-10-14 23:32:20,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:32:20" (1/1) ... [2020-10-14 23:32:20,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:32:21,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:32:21,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:32:21,505 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:32:21,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:32:21,640 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:32:21,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21 WrapperNode [2020-10-14 23:32:21,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:32:21,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:32:21,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:32:21,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:32:21,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (1/1) ... [2020-10-14 23:32:21,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:32:21,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:32:21,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:32:21,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:32:21,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (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 23:32:21,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:32:21,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:32:21,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:32:21,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:32:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:32:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-14 23:32:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-14 23:32:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-14 23:32:21,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:32:21,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:32:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:32:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:32:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:32:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:32:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:32:21,791 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:32:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:32:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:32:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:32:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:32:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:32:21,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:32:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:32:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:32:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:32:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:32:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:32:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:32:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:32:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:32:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:32:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:32:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:32:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:32:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:32:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:32:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:32:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:32:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:32:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:32:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:32:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:32:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:32:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:32:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:32:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:32:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:32:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:32:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:32:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:32:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:32:21,802 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:32:21,802 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:32:21,802 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:32:21,802 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:32:21,802 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:32:21,802 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:32:21,803 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:32:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:32:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:32:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:32:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:32:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:32:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:32:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:32:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-14 23:32:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:32:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:32:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-14 23:32:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:32:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-14 23:32:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:32:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:32:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:32:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:32:22,093 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:32:22,298 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:32:22,299 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 23:32:22,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:32:22 BoogieIcfgContainer [2020-10-14 23:32:22,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:32:22,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:32:22,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:32:22,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:32:22,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:32:20" (1/3) ... [2020-10-14 23:32:22,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21e3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:32:22, skipping insertion in model container [2020-10-14 23:32:22,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:32:21" (2/3) ... [2020-10-14 23:32:22,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21e3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:32:22, skipping insertion in model container [2020-10-14 23:32:22,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:32:22" (3/3) ... [2020-10-14 23:32:22,321 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-10-14 23:32:22,330 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:32:22,337 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:32:22,350 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:32:22,373 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:32:22,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:32:22,374 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:32:22,374 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:32:22,374 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:32:22,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:32:22,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:32:22,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:32:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-14 23:32:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:32:22,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:22,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:22,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-10-14 23:32:22,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:22,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209482934] [2020-10-14 23:32:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:22,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:32:22,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 23:32:22,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:22,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:22,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:32:22,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:22,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:32:22,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:22,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:22,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:22,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:22,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:32:22,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:22,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:22,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:22,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:22,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 23:32:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:22,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:22,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:22,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:22,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 23:32:22,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:22,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 23:32:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:22,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-14 23:32:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:22,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:22,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:22,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:22,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:22,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-14 23:32:22,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:22,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 23:32:22,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:22,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:22,910 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 23:32:22,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209482934] [2020-10-14 23:32:22,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:32:22,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:32:22,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553417088] [2020-10-14 23:32:22,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:32:22,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:32:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:32:22,940 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-10-14 23:32:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:23,118 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-10-14 23:32:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:32:23,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 23:32:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:23,130 INFO L225 Difference]: With dead ends: 90 [2020-10-14 23:32:23,130 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:32:23,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:32:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:32:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-14 23:32:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:32:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 23:32:23,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-14 23:32:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:23,182 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 23:32:23,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:32:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 23:32:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:32:23,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:23,183 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 23:32:23,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:32:23,184 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:23,185 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-10-14 23:32:23,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:23,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149491940] [2020-10-14 23:32:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:32:23,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-14 23:32:23,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:32:23,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:23,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:32:23,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:23,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:23,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:32:23,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:23,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:23,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:23,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-14 23:32:23,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:32:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:23,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:32:23,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:23,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 23:32:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:23,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:23,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:23,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:32:23,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:23,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:23,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 23:32:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:23,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:23,481 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 23:32:23,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149491940] [2020-10-14 23:32:23,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:32:23,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:32:23,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793199075] [2020-10-14 23:32:23,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:32:23,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:32:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:32:23,485 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-14 23:32:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:23,665 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-14 23:32:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:32:23,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 23:32:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:23,667 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:32:23,667 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:32:23,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:32:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:32:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 23:32:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:32:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 23:32:23,676 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-10-14 23:32:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:23,676 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 23:32:23,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:32:23,677 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 23:32:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:32:23,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:23,678 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] [2020-10-14 23:32:23,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:32:23,678 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-10-14 23:32:23,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:23,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006392707] [2020-10-14 23:32:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:23,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:24,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:32:24,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:32:24,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-14 23:32:24,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:24,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:32:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:32:24,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:32:24,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:24,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:24,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:24,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:32:24,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:24,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:24,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:24,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:24,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:24,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:24,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 23:32:24,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:24,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-14 23:32:24,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:24,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:24,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:24,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:24,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:32:24,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:24,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 23:32:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:24,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:24,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:24,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:24,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:24,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 23:32:24,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:24,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:24,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:32:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:24,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:32:24,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:24,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006392707] [2020-10-14 23:32:24,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:24,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:32:24,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051919084] [2020-10-14 23:32:24,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:32:24,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:24,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:32:24,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:32:24,876 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 12 states. [2020-10-14 23:32:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:25,186 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-14 23:32:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:32:25,187 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 23:32:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:25,190 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:32:25,190 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:32:25,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:32:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:32:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 23:32:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:32:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 23:32:25,202 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 28 [2020-10-14 23:32:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:25,202 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 23:32:25,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:32:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 23:32:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:32:25,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:25,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:25,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:32:25,205 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:25,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-10-14 23:32:25,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:25,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225294786] [2020-10-14 23:32:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:25,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:25,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:32:25,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:25,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-14 23:32:25,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:25,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:32:25,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:25,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:32:25,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:25,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:25,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:25,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:25,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:32:25,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:25,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:25,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:25,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:25,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:25,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:25,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:25,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:25,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 23:32:25,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:25,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-14 23:32:25,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:25,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:25,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:32:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:25,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:32:25,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 23:32:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:25,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:25,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 23:32:25,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:25,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:32:25,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:25,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:25,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:25,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-14 23:32:25,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:25,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:32:25,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225294786] [2020-10-14 23:32:25,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:25,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:32:25,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022453332] [2020-10-14 23:32:25,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:32:25,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:25,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:32:25,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:32:25,454 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-14 23:32:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:25,626 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-14 23:32:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:32:25,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-14 23:32:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:25,627 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:32:25,627 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:32:25,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:32:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:32:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-14 23:32:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 23:32:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-14 23:32:25,635 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-10-14 23:32:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:25,635 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-14 23:32:25,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:32:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-14 23:32:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:32:25,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:25,637 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] [2020-10-14 23:32:25,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:32:25,637 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-10-14 23:32:25,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:25,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424545918] [2020-10-14 23:32:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:25,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:25,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:32:26,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:32:26,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-14 23:32:26,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:26,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:26,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:32:26,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:26,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:26,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:26,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:26,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:26,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:26,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 23:32:26,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 23:32:26,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:32:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:26,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 23:32:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:26,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:26,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:32:26,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 23:32:26,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:26,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:32:26,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424545918] [2020-10-14 23:32:26,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:26,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:32:26,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058842804] [2020-10-14 23:32:26,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:32:26,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:32:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:32:26,489 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-14 23:32:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:26,702 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-14 23:32:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:32:26,702 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-14 23:32:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:26,703 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:32:26,704 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:32:26,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:32:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:32:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-14 23:32:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:32:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-14 23:32:26,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-10-14 23:32:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:26,714 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-14 23:32:26,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:32:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-14 23:32:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:32:26,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:26,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:26,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:32:26,718 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:26,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:26,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1706812894, now seen corresponding path program 3 times [2020-10-14 23:32:26,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:26,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211845786] [2020-10-14 23:32:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:32:26,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:26,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-14 23:32:26,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:32:26,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 23:32:26,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:32:26,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:26,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:26,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:26,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:26,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:26,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:26,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:26,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:26,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:26,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:26,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:32:27,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-14 23:32:27,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:32:27,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:27,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:32:27,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:32:27,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 23:32:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 23:32:27,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 23:32:27,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:32:27,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:27,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:32:27,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 23:32:27,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211845786] [2020-10-14 23:32:27,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:32:27,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-14 23:32:27,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219079448] [2020-10-14 23:32:27,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:32:27,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:32:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:32:27,151 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-10-14 23:32:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:27,436 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-14 23:32:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:32:27,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 23:32:27,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:27,438 INFO L225 Difference]: With dead ends: 43 [2020-10-14 23:32:27,438 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:32:27,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:32:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:32:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 23:32:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:32:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-14 23:32:27,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2020-10-14 23:32:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:27,448 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-14 23:32:27,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:32:27,448 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-14 23:32:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:32:27,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:27,450 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:27,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:32:27,450 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:27,450 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 2 times [2020-10-14 23:32:27,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:27,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018555530] [2020-10-14 23:32:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:32:27,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-14 23:32:27,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:32:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 23:32:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:32:27,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:27,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:27,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:27,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:27,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:27,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:32:27,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:27,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:27,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:27,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:27,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:27,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:28,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:32:28,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:28,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-14 23:32:28,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:28,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:28,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:32:28,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:32:28,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:28,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 23:32:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:28,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:28,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 23:32:28,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:28,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 23:32:28,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:28,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:32:28,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 23:32:28,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:32:28,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:32:28,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018555530] [2020-10-14 23:32:28,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:28,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:32:28,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260284598] [2020-10-14 23:32:28,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:32:28,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:28,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:32:28,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:32:28,180 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-10-14 23:32:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:28,712 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-14 23:32:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:32:28,712 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-14 23:32:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:28,713 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:32:28,713 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:32:28,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:32:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:32:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 23:32:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:32:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-14 23:32:28,728 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-10-14 23:32:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:28,729 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-14 23:32:28,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:32:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-14 23:32:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:32:28,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:28,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:28,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:32:28,732 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:28,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 3 times [2020-10-14 23:32:28,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:28,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046413933] [2020-10-14 23:32:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:28,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:29,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:32:30,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:32:30,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-14 23:32:30,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:30,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:32:30,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:32:30,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:32:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:32:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:32:30,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:30,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:32:30,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:32:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:30,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:32:30,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 23:32:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:32:30,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:32:30,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 23:32:30,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:32:30,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:32:30,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:30,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 23:32:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:32:30,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:32:30,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:32:30,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 23:32:30,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:32:30,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 23:32:30,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:32:30,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:32:30,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:32:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:32:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:32:30,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:32:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 23:32:30,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046413933] [2020-10-14 23:32:30,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:32:30,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:32:30,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314122256] [2020-10-14 23:32:30,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:32:30,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:32:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:32:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:32:30,643 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-14 23:32:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:32:31,002 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-14 23:32:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:32:31,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 23:32:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:32:31,004 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:32:31,004 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 23:32:31,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:32:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 23:32:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-14 23:32:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:32:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 23:32:31,022 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-10-14 23:32:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:32:31,022 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 23:32:31,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:32:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 23:32:31,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 23:32:31,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:32:31,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:32:31,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:32:31,027 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:32:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:32:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 4 times [2020-10-14 23:32:31,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:32:31,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734196283] [2020-10-14 23:32:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:32:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:32:31,049 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:32:31,049 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:32:31,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:32:31,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:32:31 BoogieIcfgContainer [2020-10-14 23:32:31,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:32:31,090 INFO L168 Benchmark]: Toolchain (without parser) took 10114.67 ms. Allocated memory was 147.8 MB in the beginning and 337.1 MB in the end (delta: 189.3 MB). Free memory was 101.3 MB in the beginning and 242.6 MB in the end (delta: -141.3 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:32:31,091 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 23:32:31,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 672.41 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 100.8 MB in the beginning and 171.5 MB in the end (delta: -70.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:32:31,093 INFO L168 Benchmark]: Boogie Preprocessor took 70.63 ms. Allocated memory is still 205.5 MB. Free memory was 171.5 MB in the beginning and 168.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-14 23:32:31,093 INFO L168 Benchmark]: RCFGBuilder took 593.80 ms. Allocated memory is still 205.5 MB. Free memory was 168.8 MB in the beginning and 125.4 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:32:31,097 INFO L168 Benchmark]: TraceAbstraction took 8770.40 ms. Allocated memory was 205.5 MB in the beginning and 337.1 MB in the end (delta: 131.6 MB). Free memory was 125.4 MB in the beginning and 242.6 MB in the end (delta: -117.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:32:31,109 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 672.41 ms. Allocated memory was 147.8 MB in the beginning and 205.5 MB in the end (delta: 57.7 MB). Free memory was 100.8 MB in the beginning and 171.5 MB in the end (delta: -70.7 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.63 ms. Allocated memory is still 205.5 MB. Free memory was 171.5 MB in the beginning and 168.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 593.80 ms. Allocated memory is still 205.5 MB. Free memory was 168.8 MB in the beginning and 125.4 MB in the end (delta: 43.4 MB). Peak memory consumption was 43.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8770.40 ms. Allocated memory was 205.5 MB in the beginning and 337.1 MB in the end (delta: 131.6 MB). Free memory was 125.4 MB in the beginning and 242.6 MB in the end (delta: -117.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.6s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 338 SDslu, 588 SDs, 0 SdLazy, 1056 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=8, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 278 NumberOfCodeBlocks, 278 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 233 ConstructedInterpolants, 0 QuantifiedInterpolants, 24986 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 34/48 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...