/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/forester-heap/sll-rb-sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:23:31,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:23:31,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:23:31,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:23:31,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:23:31,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:23:31,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:23:31,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:23:31,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:23:31,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:23:31,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:23:31,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:23:31,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:23:31,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:23:31,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:23:31,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:23:31,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:23:31,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:23:31,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:23:31,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:23:31,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:23:31,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:23:31,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:23:31,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:23:31,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:23:31,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:23:31,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:23:31,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:23:31,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:23:31,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:23:31,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:23:31,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:23:32,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:23:32,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:23:32,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:23:32,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:23:32,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:23:32,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:23:32,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:23:32,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:23:32,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:23:32,005 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 23:23:32,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:23:32,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:23:32,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:23:32,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:23:32,029 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:23:32,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:23:32,029 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:23:32,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:23:32,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:23:32,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:23:32,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:23:32,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:23:32,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:23:32,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:23:32,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:23:32,031 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:23:32,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:23:32,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:23:32,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:23:32,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:23:32,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:23:32,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:23:32,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:23:32,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:23:32,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:23:32,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:23:32,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:23:32,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:23:32,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:23:32,033 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 23:23:32,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:23:32,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:23:32,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:23:32,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:23:32,398 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:23:32,399 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-10-14 23:23:32,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccce3f947/52e55adc293040e9bd54bc7c9ce69753/FLAGdabd1ed61 [2020-10-14 23:23:33,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:23:33,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-rb-sentinel-2.i [2020-10-14 23:23:33,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccce3f947/52e55adc293040e9bd54bc7c9ce69753/FLAGdabd1ed61 [2020-10-14 23:23:33,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccce3f947/52e55adc293040e9bd54bc7c9ce69753 [2020-10-14 23:23:33,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:23:33,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:23:33,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:23:33,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:23:33,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:23:33,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:23:33" (1/1) ... [2020-10-14 23:23:33,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2403f591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:33, skipping insertion in model container [2020-10-14 23:23:33,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:23:33" (1/1) ... [2020-10-14 23:23:33,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:23:33,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:23:33,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:23:33,889 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:23:33,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:23:34,022 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:23:34,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34 WrapperNode [2020-10-14 23:23:34,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:23:34,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:23:34,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:23:34,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:23:34,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (1/1) ... [2020-10-14 23:23:34,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:23:34,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:23:34,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:23:34,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:23:34,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (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 23:23:34,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:23:34,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:23:34,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:23:34,155 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:23:34,155 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:23:34,155 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:23:34,155 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:23:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:23:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:23:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:23:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:23:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:23:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:23:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:23:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:23:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:23:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:23:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:23:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:23:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:23:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:23:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:23:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:23:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:23:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:23:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:23:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:23:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:23:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:23:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:23:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:23:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:23:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:23:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:23:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:23:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:23:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:23:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:23:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:23:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:23:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:23:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:23:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:23:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:23:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:23:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:23:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:23:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:23:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:23:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:23:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:23:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:23:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:23:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:23:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:23:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:23:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:23:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:23:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:23:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:23:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:23:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:23:34,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:23:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:23:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:23:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:23:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:23:34,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:23:34,701 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:23:34,702 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-14 23:23:34,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:23:34 BoogieIcfgContainer [2020-10-14 23:23:34,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:23:34,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:23:34,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:23:34,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:23:34,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:23:33" (1/3) ... [2020-10-14 23:23:34,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3309e95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:23:34, skipping insertion in model container [2020-10-14 23:23:34,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:23:34" (2/3) ... [2020-10-14 23:23:34,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3309e95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:23:34, skipping insertion in model container [2020-10-14 23:23:34,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:23:34" (3/3) ... [2020-10-14 23:23:34,719 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2020-10-14 23:23:34,730 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:23:34,738 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-14 23:23:34,753 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-14 23:23:34,785 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:23:34,785 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:23:34,785 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:23:34,785 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:23:34,786 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:23:34,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:23:34,787 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:23:34,787 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:23:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-14 23:23:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:23:34,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:34,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:34,814 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash -742552803, now seen corresponding path program 1 times [2020-10-14 23:23:34,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:34,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218581762] [2020-10-14 23:23:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:34,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:35,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:35,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:35,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 23:23:35,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:23:35,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-14 23:23:35,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:35,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:23:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:23:35,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:23:35,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:35,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:35,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:35,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:35,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:23:35,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:35,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:35,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:35,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:35,384 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 23:23:35,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218581762] [2020-10-14 23:23:35,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:23:35,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:23:35,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195629856] [2020-10-14 23:23:35,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:23:35,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:23:35,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:23:35,411 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-14 23:23:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:35,616 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2020-10-14 23:23:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:23:35,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 23:23:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:35,638 INFO L225 Difference]: With dead ends: 73 [2020-10-14 23:23:35,638 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 23:23:35,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:23:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 23:23:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-14 23:23:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:23:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 23:23:35,702 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2020-10-14 23:23:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:35,703 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 23:23:35,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:23:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 23:23:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:23:35,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:35,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:35,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:23:35,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1973625457, now seen corresponding path program 1 times [2020-10-14 23:23:35,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:35,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486409606] [2020-10-14 23:23:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:35,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:35,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:35,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:23:35,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:35,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-14 23:23:35,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:35,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:23:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:23:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:35,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:35,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:35,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:35,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:35,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:35,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:23:35,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:35,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:35,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:35,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:35,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:35,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:35,973 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 23:23:35,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486409606] [2020-10-14 23:23:35,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:23:35,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:23:35,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523794981] [2020-10-14 23:23:35,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:23:35,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:35,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:23:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:23:35,977 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-14 23:23:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:36,137 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-14 23:23:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:23:36,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 23:23:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:36,140 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:23:36,140 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:23:36,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:23:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:23:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2020-10-14 23:23:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 23:23:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-14 23:23:36,150 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 14 [2020-10-14 23:23:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:36,150 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-14 23:23:36,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:23:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-14 23:23:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:23:36,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:36,152 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:36,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:23:36,152 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash -954667545, now seen corresponding path program 1 times [2020-10-14 23:23:36,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:36,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638937305] [2020-10-14 23:23:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:36,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:36,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:36,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:23:36,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:36,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-14 23:23:36,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:36,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:23:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:36,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:23:36,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:36,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:36,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:36,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:36,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:36,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:36,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:23:36,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:36,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:36,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:36,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:36,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:36,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638937305] [2020-10-14 23:23:36,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:36,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:23:36,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458105764] [2020-10-14 23:23:36,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:23:36,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:23:36,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:23:36,654 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-10-14 23:23:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:36,881 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-14 23:23:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:23:36,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-14 23:23:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:36,883 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:23:36,883 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 23:23:36,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:23:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 23:23:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-10-14 23:23:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:23:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 23:23:36,890 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-14 23:23:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:36,890 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 23:23:36,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:23:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 23:23:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:23:36,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:36,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:36,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:23:36,892 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash 903516662, now seen corresponding path program 1 times [2020-10-14 23:23:36,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:36,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002670514] [2020-10-14 23:23:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:36,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:37,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:37,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:23:37,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:23:37,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-14 23:23:37,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:37,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:37,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:23:37,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:37,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:23:37,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:37,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:37,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:37,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:37,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:37,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:37,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:23:37,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:37,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:37,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:37,185 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 23:23:37,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002670514] [2020-10-14 23:23:37,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:23:37,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:23:37,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020109910] [2020-10-14 23:23:37,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:23:37,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:23:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:23:37,189 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-10-14 23:23:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:37,351 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-10-14 23:23:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:23:37,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 23:23:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:37,353 INFO L225 Difference]: With dead ends: 62 [2020-10-14 23:23:37,353 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:23:37,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:23:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:23:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-14 23:23:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:23:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-14 23:23:37,367 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 18 [2020-10-14 23:23:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:37,367 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-14 23:23:37,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:23:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-14 23:23:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:23:37,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:37,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:37,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:23:37,371 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1223911862, now seen corresponding path program 1 times [2020-10-14 23:23:37,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:37,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566092015] [2020-10-14 23:23:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:37,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:37,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:37,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:23:37,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:23:37,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-14 23:23:37,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:37,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:23:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:37,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:23:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:23:37,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:37,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:37,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:37,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:23:37,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:37,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:37,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566092015] [2020-10-14 23:23:37,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:37,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:23:37,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010621141] [2020-10-14 23:23:37,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:23:37,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:37,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:23:37,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:23:37,619 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2020-10-14 23:23:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:37,841 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-14 23:23:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:23:37,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 23:23:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:37,843 INFO L225 Difference]: With dead ends: 51 [2020-10-14 23:23:37,844 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:23:37,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:23:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:23:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 23:23:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:23:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 23:23:37,857 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-10-14 23:23:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:37,858 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 23:23:37,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:23:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 23:23:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:23:37,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:37,861 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:37,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:23:37,862 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1696156082, now seen corresponding path program 1 times [2020-10-14 23:23:37,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:37,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466298474] [2020-10-14 23:23:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:38,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:38,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:38,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:23:38,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:23:38,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-14 23:23:38,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:38,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:23:38,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:38,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:23:38,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:38,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:38,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:38,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:38,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:38,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:23:38,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:38,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:38,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:38,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:38,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:38,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466298474] [2020-10-14 23:23:38,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:38,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:23:38,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482922910] [2020-10-14 23:23:38,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:23:38,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:23:38,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:23:38,734 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-14 23:23:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:39,068 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-14 23:23:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:23:39,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-14 23:23:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:39,069 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:23:39,069 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:23:39,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:23:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:23:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2020-10-14 23:23:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 23:23:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-14 23:23:39,084 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-14 23:23:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:39,086 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-14 23:23:39,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:23:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-14 23:23:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:23:39,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:39,087 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:39,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:23:39,088 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:39,088 INFO L82 PathProgramCache]: Analyzing trace with hash 108390666, now seen corresponding path program 1 times [2020-10-14 23:23:39,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:39,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754542829] [2020-10-14 23:23:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:39,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:39,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:39,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:39,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:23:39,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:23:39,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-14 23:23:39,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:39,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:23:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:39,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:23:39,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:39,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:39,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:39,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:39,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:39,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:39,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:23:39,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:39,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:39,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:39,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:39,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754542829] [2020-10-14 23:23:39,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:39,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:23:39,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585062786] [2020-10-14 23:23:39,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:23:39,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:23:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:23:39,850 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2020-10-14 23:23:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:40,179 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2020-10-14 23:23:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:23:40,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:23:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:40,181 INFO L225 Difference]: With dead ends: 69 [2020-10-14 23:23:40,181 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:23:40,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:23:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:23:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2020-10-14 23:23:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:23:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-14 23:23:40,190 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2020-10-14 23:23:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:40,191 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-14 23:23:40,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:23:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-14 23:23:40,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:23:40,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:40,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:40,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:23:40,193 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476830, now seen corresponding path program 1 times [2020-10-14 23:23:40,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:40,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158535603] [2020-10-14 23:23:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:40,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:40,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:23:40,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-14 23:23:40,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:40,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:40,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:23:40,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:40,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:23:40,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:40,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:40,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:40,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:40,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:40,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:40,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:23:40,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:40,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:40,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:40,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:40,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:40,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:40,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158535603] [2020-10-14 23:23:40,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:40,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:23:40,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060401243] [2020-10-14 23:23:40,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:23:40,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:40,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:23:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:23:40,728 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-14 23:23:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:41,410 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-14 23:23:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:23:41,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:23:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:41,413 INFO L225 Difference]: With dead ends: 101 [2020-10-14 23:23:41,413 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 23:23:41,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:23:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 23:23:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2020-10-14 23:23:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:23:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-14 23:23:41,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 24 [2020-10-14 23:23:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:41,422 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-14 23:23:41,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:23:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-14 23:23:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:23:41,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:41,424 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:41,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:23:41,424 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1129459020, now seen corresponding path program 1 times [2020-10-14 23:23:41,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:41,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392969001] [2020-10-14 23:23:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:41,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:41,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:41,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:23:41,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:23:41,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 23:23:41,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:41,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:23:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:41,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:23:41,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:41,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:41,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:41,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:41,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:41,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:41,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:23:41,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:41,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:41,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:41,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:41,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392969001] [2020-10-14 23:23:41,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:41,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:23:41,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236204673] [2020-10-14 23:23:41,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:23:41,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:23:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:23:41,901 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-10-14 23:23:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:42,154 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-14 23:23:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:23:42,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 23:23:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:42,158 INFO L225 Difference]: With dead ends: 87 [2020-10-14 23:23:42,158 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 23:23:42,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:23:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 23:23:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2020-10-14 23:23:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:23:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-14 23:23:42,167 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 24 [2020-10-14 23:23:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:42,167 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-14 23:23:42,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:23:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-14 23:23:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:23:42,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:42,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:42,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:23:42,169 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2050422112, now seen corresponding path program 1 times [2020-10-14 23:23:42,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:42,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572050882] [2020-10-14 23:23:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:42,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:42,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:23:42,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:42,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-14 23:23:42,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:42,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:23:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:23:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:23:42,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:42,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:23:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:23:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:23:42,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:23:42,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:23:42,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:23:42,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:23:42,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:23:42,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:23:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:23:42,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:23:42,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:23:42,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:23:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:23:42,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572050882] [2020-10-14 23:23:42,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:23:42,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:23:42,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431168862] [2020-10-14 23:23:42,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:23:42,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:23:42,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:23:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:23:42,622 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 9 states. [2020-10-14 23:23:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:23:42,985 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-14 23:23:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:23:42,986 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 23:23:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:23:42,987 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:23:42,987 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 23:23:42,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:23:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 23:23:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-14 23:23:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 23:23:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-14 23:23:42,995 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 24 [2020-10-14 23:23:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:23:42,995 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-14 23:23:42,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:23:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-14 23:23:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:23:42,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:23:42,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:23:42,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:23:42,997 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:23:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:23:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1509760762, now seen corresponding path program 1 times [2020-10-14 23:23:42,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:23:42,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485250142] [2020-10-14 23:23:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:23:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:23:43,016 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:23:43,017 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:23:43,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:23:43,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:23:43 BoogieIcfgContainer [2020-10-14 23:23:43,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:23:43,043 INFO L168 Benchmark]: Toolchain (without parser) took 9651.66 ms. Allocated memory was 148.9 MB in the beginning and 307.2 MB in the end (delta: 158.3 MB). Free memory was 104.2 MB in the beginning and 114.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 148.1 MB. Max. memory is 7.1 GB. [2020-10-14 23:23:43,044 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-10-14 23:23:43,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.96 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 103.8 MB in the beginning and 171.6 MB in the end (delta: -67.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:23:43,045 INFO L168 Benchmark]: Boogie Preprocessor took 66.33 ms. Allocated memory is still 205.0 MB. Free memory was 171.6 MB in the beginning and 168.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-14 23:23:43,046 INFO L168 Benchmark]: RCFGBuilder took 615.57 ms. Allocated memory is still 205.0 MB. Free memory was 167.8 MB in the beginning and 121.3 MB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. [2020-10-14 23:23:43,047 INFO L168 Benchmark]: TraceAbstraction took 8332.74 ms. Allocated memory was 205.0 MB in the beginning and 307.2 MB in the end (delta: 102.2 MB). Free memory was 121.3 MB in the beginning and 114.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. [2020-10-14 23:23:43,050 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 631.96 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 103.8 MB in the beginning and 171.6 MB in the end (delta: -67.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.33 ms. Allocated memory is still 205.0 MB. Free memory was 171.6 MB in the beginning and 168.7 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 615.57 ms. Allocated memory is still 205.0 MB. Free memory was 167.8 MB in the beginning and 121.3 MB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8332.74 ms. Allocated memory was 205.0 MB in the beginning and 307.2 MB in the end (delta: 102.2 MB). Free memory was 121.3 MB in the beginning and 114.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 109.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1039]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* null = malloc(sizeof(SLL)); [L995] null->colour = BLACK [L996] null->next = ((void*)0) [L998] SLL* list = malloc(sizeof(SLL)); [L999] list->next = null [L1000] list->colour = BLACK [L1002] SLL* end = list; [L1005] COND TRUE __VERIFIER_nondet_int() [L1008] end->next = malloc(sizeof(SLL)) [L1009] EXPR end->next [L1009] end = end->next [L1010] end->next = null [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1018] end->colour = RED [L1019] end->next = malloc(sizeof(SLL)) [L1020] EXPR end->next [L1020] end = end->next [L1021] end->next = null [L1022] end->colour = BLACK [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end = null [L1027] end = list [L1030] COND FALSE !(!(null != end)) [L1031] EXPR end->colour [L1031] COND FALSE !(!(BLACK == end->colour)) [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND FALSE !(RED == end->colour) [L1042] EXPR end->next [L1042] end = end->next [L1033] COND TRUE null != end [L1035] EXPR end->colour [L1035] COND TRUE RED == end->colour [L1037] EXPR end->next [L1037] end = end->next [L1038] COND FALSE !(!(null != end)) [L1039] EXPR end->colour [L1039] COND TRUE !(BLACK != end->colour) [L1039] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 257 SDtfs, 363 SDslu, 874 SDs, 0 SdLazy, 1261 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=10, 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, 10 MinimizatonAttempts, 159 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 38836 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 1/18 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...