/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:03:41,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:03:41,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:03:41,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:03:41,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:03:41,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:03:41,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:03:41,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:03:41,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:03:41,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:03:41,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:03:41,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:03:41,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:03:41,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:03:41,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:03:41,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:03:41,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:03:41,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:03:41,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:03:41,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:03:41,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:03:41,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:03:41,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:03:41,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:03:41,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:03:41,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:03:41,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:03:41,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:03:41,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:03:41,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:03:41,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:03:41,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:03:41,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:03:41,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:03:41,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:03:41,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:03:41,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:03:41,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:03:41,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:03:41,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:03:41,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:03:41,978 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 05:03:42,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:03:42,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:03:42,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:03:42,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:03:42,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:03:42,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:03:42,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:03:42,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:03:42,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:03:42,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:03:42,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:03:42,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:03:42,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:03:42,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:03:42,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:03:42,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:03:42,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:03:42,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:03:42,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:03:42,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:03:42,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:03:42,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:03:42,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:03:42,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:03:42,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:03:42,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:03:42,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:03:42,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:03:42,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:03:42,033 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:03:42,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:03:42,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:03:42,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:03:42,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:03:42,405 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:03:42,405 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list-2.i [2020-10-14 05:03:42,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b05c4d8f/7ad690b0dd624906a6224498f484f310/FLAG30aee2d5e [2020-10-14 05:03:43,021 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:03:43,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list-2.i [2020-10-14 05:03:43,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b05c4d8f/7ad690b0dd624906a6224498f484f310/FLAG30aee2d5e [2020-10-14 05:03:43,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b05c4d8f/7ad690b0dd624906a6224498f484f310 [2020-10-14 05:03:43,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:03:43,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:03:43,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:43,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:03:43,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:03:43,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f006d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:43, skipping insertion in model container [2020-10-14 05:03:43,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:03:43" (1/1) ... [2020-10-14 05:03:43,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:03:43,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:03:43,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:43,921 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:03:43,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:03:44,046 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:03:44,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44 WrapperNode [2020-10-14 05:03:44,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:03:44,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:03:44,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:03:44,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:03:44,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (1/1) ... [2020-10-14 05:03:44,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:03:44,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:03:44,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:03:44,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:03:44,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (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 05:03:44,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:03:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:03:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:03:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:03:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 05:03:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 05:03:44,175 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 05:03:44,176 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:03:44,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:03:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:03:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:03:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:03:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:03:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:03:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:03:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:03:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:03:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:03:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:03:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:03:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:03:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:03:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:03:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:03:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:03:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:03:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:03:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:03:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:03:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 05:03:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 05:03:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 05:03:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:03:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:03:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:03:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:03:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:03:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:03:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:03:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:03:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:03:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:03:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:03:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:03:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:03:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:03:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:03:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:03:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:03:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:03:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:03:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:03:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:03:44,187 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:03:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:03:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:03:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:03:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:03:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:03:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:03:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:03:44,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:03:44,191 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:03:44,192 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:03:44,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:03:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:03:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:03:44,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:03:44,550 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:03:44,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:03:44,695 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:03:44,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:44 BoogieIcfgContainer [2020-10-14 05:03:44,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:03:44,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:03:44,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:03:44,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:03:44,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:03:43" (1/3) ... [2020-10-14 05:03:44,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e7d32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:44, skipping insertion in model container [2020-10-14 05:03:44,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:03:44" (2/3) ... [2020-10-14 05:03:44,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e7d32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:03:44, skipping insertion in model container [2020-10-14 05:03:44,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:03:44" (3/3) ... [2020-10-14 05:03:44,708 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2020-10-14 05:03:44,719 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:03:44,727 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:03:44,741 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:03:44,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:03:44,767 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:03:44,767 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:03:44,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:03:44,767 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:03:44,768 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:03:44,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:03:44,768 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:03:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-14 05:03:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:03:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:44,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:44,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1613857984, now seen corresponding path program 1 times [2020-10-14 05:03:44,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:44,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34364755] [2020-10-14 05:03:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:45,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:03:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-14 05:03:45,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:03:45,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:03:45,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:45,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 05:03:45,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:45,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:45,346 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 05:03:45,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34364755] [2020-10-14 05:03:45,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:45,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:03:45,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783166227] [2020-10-14 05:03:45,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:03:45,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:03:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:45,375 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-14 05:03:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:45,478 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-10-14 05:03:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:03:45,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:03:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:45,488 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:03:45,488 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:03:45,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:03:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:03:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 05:03:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:03:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:03:45,531 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-10-14 05:03:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:45,531 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:03:45,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:03:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:03:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:03:45,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:45,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:45,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:03:45,533 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1642379272, now seen corresponding path program 1 times [2020-10-14 05:03:45,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:45,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852763975] [2020-10-14 05:03:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:03:45,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-14 05:03:45,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:45,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:03:45,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:45,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:45,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:03:45,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:45,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:45,699 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 05:03:45,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852763975] [2020-10-14 05:03:45,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:45,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:45,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709238004] [2020-10-14 05:03:45,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:45,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:45,703 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-14 05:03:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:45,832 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-14 05:03:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:45,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:03:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:45,836 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:03:45,836 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:03:45,837 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 05:03:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:03:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-14 05:03:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:03:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-14 05:03:45,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2020-10-14 05:03:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:45,846 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-14 05:03:45,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-14 05:03:45,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:03:45,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:45,848 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] [2020-10-14 05:03:45,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:03:45,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2024806125, now seen corresponding path program 1 times [2020-10-14 05:03:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:45,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039128930] [2020-10-14 05:03:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:03:45,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-14 05:03:45,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:45,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:03:45,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:45,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:45,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:45,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:45,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:45,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:45,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:45,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:45,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:45,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039128930] [2020-10-14 05:03:45,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:45,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:45,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883120848] [2020-10-14 05:03:45,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:45,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:45,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:45,973 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-10-14 05:03:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:46,105 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 05:03:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:46,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 05:03:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:46,107 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:03:46,107 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:03:46,108 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 05:03:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:03:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-14 05:03:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:03:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-14 05:03:46,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-14 05:03:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:46,115 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-14 05:03:46,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-14 05:03:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:03:46,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:46,117 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] [2020-10-14 05:03:46,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:03:46,117 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:46,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1000103149, now seen corresponding path program 1 times [2020-10-14 05:03:46,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:46,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762952027] [2020-10-14 05:03:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:03:46,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:46,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 05:03:46,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:03:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:03:46,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:46,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:46,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:03:46,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:46,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:46,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:03:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:46,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762952027] [2020-10-14 05:03:46,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:03:46,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 05:03:46,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502682536] [2020-10-14 05:03:46,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:03:46,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:03:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:03:46,292 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 6 states. [2020-10-14 05:03:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:46,467 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 05:03:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:03:46,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 05:03:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:46,469 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:03:46,469 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:03:46,470 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 05:03:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:03:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-14 05:03:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:03:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 05:03:46,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-10-14 05:03:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:46,482 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 05:03:46,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:03:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 05:03:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:03:46,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:46,484 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 05:03:46,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:03:46,484 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash 422878047, now seen corresponding path program 1 times [2020-10-14 05:03:46,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:46,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750182057] [2020-10-14 05:03:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:03:46,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:46,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-14 05:03:46,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:46,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:03:46,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:46,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:46,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:46,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:46,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:46,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:46,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:46,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:46,970 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 05:03:46,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750182057] [2020-10-14 05:03:46,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:46,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:46,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924718711] [2020-10-14 05:03:46,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:46,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:46,972 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 10 states. [2020-10-14 05:03:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:47,177 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-14 05:03:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:03:47,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:03:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:47,178 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:03:47,178 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:03:47,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:03:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-10-14 05:03:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 05:03:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-14 05:03:47,186 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-10-14 05:03:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:47,186 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-14 05:03:47,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-14 05:03:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:03:47,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:47,188 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 05:03:47,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:03:47,188 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1286279711, now seen corresponding path program 1 times [2020-10-14 05:03:47,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:47,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252753976] [2020-10-14 05:03:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:47,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:47,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:03:47,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:47,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-14 05:03:47,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:47,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:47,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:03:47,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:47,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:47,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:47,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:47,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:47,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:47,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:47,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:47,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:47,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:47,673 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 05:03:47,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252753976] [2020-10-14 05:03:47,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:47,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:03:47,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731777035] [2020-10-14 05:03:47,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:03:47,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:47,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:03:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:03:47,679 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 9 states. [2020-10-14 05:03:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:48,046 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-14 05:03:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:03:48,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:03:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:48,048 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:03:48,048 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:03:48,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:03:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:03:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-10-14 05:03:48,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:03:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-14 05:03:48,061 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 24 [2020-10-14 05:03:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:48,062 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-14 05:03:48,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:03:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-14 05:03:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:03:48,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:48,065 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] [2020-10-14 05:03:48,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:03:48,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1587413318, now seen corresponding path program 1 times [2020-10-14 05:03:48,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:48,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797647272] [2020-10-14 05:03:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:03:48,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:03:48,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 680 [2020-10-14 05:03:48,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:48,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:48,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:48,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:48,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:48,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:48,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:48,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:48,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:48,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:03:48,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:48,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:48,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:48,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:48,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:48,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:48,975 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 05:03:48,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797647272] [2020-10-14 05:03:48,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:48,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:48,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613621282] [2020-10-14 05:03:48,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:48,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:48,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:48,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:48,979 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2020-10-14 05:03:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:49,371 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-14 05:03:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:49,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 05:03:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:49,373 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:03:49,374 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 05:03:49,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 05:03:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-10-14 05:03:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:03:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-14 05:03:49,395 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2020-10-14 05:03:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:49,397 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-14 05:03:49,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-14 05:03:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:49,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:49,400 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:49,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:03:49,401 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash -742131883, now seen corresponding path program 2 times [2020-10-14 05:03:49,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:49,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325762885] [2020-10-14 05:03:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:49,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:49,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:50,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 05:03:50,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 796 [2020-10-14 05:03:50,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:50,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:50,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:50,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:50,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:50,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:50,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:50,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:50,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:50,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:50,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325762885] [2020-10-14 05:03:50,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:50,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:50,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316378225] [2020-10-14 05:03:50,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:50,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:50,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:50,384 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 10 states. [2020-10-14 05:03:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:50,630 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-14 05:03:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:50,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:03:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:50,632 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:03:50,632 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:03:50,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:03:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-14 05:03:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 05:03:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-14 05:03:50,638 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 28 [2020-10-14 05:03:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:50,639 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-14 05:03:50,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-14 05:03:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:50,640 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:03:50,640 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1474620245, now seen corresponding path program 1 times [2020-10-14 05:03:50,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:50,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886420340] [2020-10-14 05:03:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:50,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:50,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-14 05:03:50,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:50,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:50,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:03:50,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:50,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:50,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:50,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:50,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:50,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:50,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:50,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:50,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:50,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:50,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:50,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:50,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886420340] [2020-10-14 05:03:50,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:50,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:03:50,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88596106] [2020-10-14 05:03:50,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:03:50,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:50,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:03:50,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:03:50,848 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-10-14 05:03:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:51,060 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 05:03:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:51,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 05:03:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:51,062 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:03:51,062 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 05:03:51,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 05:03:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-14 05:03:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:03:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:03:51,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 28 [2020-10-14 05:03:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:51,067 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:03:51,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:03:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:03:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:51,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:51,069 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:51,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:03:51,069 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -149429434, now seen corresponding path program 2 times [2020-10-14 05:03:51,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:51,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951117820] [2020-10-14 05:03:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:51,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:03:51,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:03:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:51,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:51,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:51,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:51,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:51,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:51,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951117820] [2020-10-14 05:03:51,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:51,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:03:51,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124768983] [2020-10-14 05:03:51,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:03:51,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:03:51,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:03:51,362 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 11 states. [2020-10-14 05:03:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:51,540 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-14 05:03:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:03:51,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:03:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:51,542 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:03:51,542 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:03:51,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:03:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:03:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-14 05:03:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:03:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-14 05:03:51,548 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2020-10-14 05:03:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:51,549 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-14 05:03:51,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:03:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-14 05:03:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:03:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:51,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:51,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:03:51,550 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash 150272518, now seen corresponding path program 1 times [2020-10-14 05:03:51,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:51,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462009915] [2020-10-14 05:03:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:03:51,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-14 05:03:51,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:03:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:51,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:51,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:51,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:51,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:51,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:51,810 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 05:03:51,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462009915] [2020-10-14 05:03:51,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:51,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:03:51,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063496131] [2020-10-14 05:03:51,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:03:51,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:03:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:03:51,813 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 11 states. [2020-10-14 05:03:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:52,057 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-14 05:03:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:03:52,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:03:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:52,059 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:03:52,059 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:03:52,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:03:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:03:52,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 05:03:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:03:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-14 05:03:52,065 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-10-14 05:03:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:52,065 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-14 05:03:52,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:03:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-14 05:03:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:03:52,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:52,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:52,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:03:52,067 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash -794385695, now seen corresponding path program 2 times [2020-10-14 05:03:52,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:52,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770769948] [2020-10-14 05:03:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:52,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:52,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:03:52,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-14 05:03:52,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:52,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:03:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:03:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:52,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:52,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:52,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:52,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:52,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:52,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:52,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:03:52,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:52,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:52,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:52,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:03:52,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770769948] [2020-10-14 05:03:52,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:52,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:03:52,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390104265] [2020-10-14 05:03:52,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:03:52,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:52,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:03:52,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:03:52,582 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2020-10-14 05:03:52,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:52,971 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2020-10-14 05:03:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:03:52,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 05:03:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:52,973 INFO L225 Difference]: With dead ends: 86 [2020-10-14 05:03:52,973 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:03:52,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:03:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-10-14 05:03:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:03:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-14 05:03:52,984 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 30 [2020-10-14 05:03:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:52,985 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-14 05:03:52,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:03:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-14 05:03:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:03:52,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:52,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:52,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:03:52,986 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1568321631, now seen corresponding path program 1 times [2020-10-14 05:03:52,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:52,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172254591] [2020-10-14 05:03:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 05:03:53,004 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 05:03:53,004 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:03:53,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:03:53,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:03:53 BoogieIcfgContainer [2020-10-14 05:03:53,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:03:53,037 INFO L168 Benchmark]: Toolchain (without parser) took 9733.16 ms. Allocated memory was 147.3 MB in the beginning and 361.8 MB in the end (delta: 214.4 MB). Free memory was 102.5 MB in the beginning and 214.9 MB in the end (delta: -112.3 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:03:53,038 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 05:03:53,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 747.06 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 102.1 MB in the beginning and 168.7 MB in the end (delta: -66.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-10-14 05:03:53,040 INFO L168 Benchmark]: Boogie Preprocessor took 63.33 ms. Allocated memory is still 202.9 MB. Free memory was 168.7 MB in the beginning and 165.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:03:53,041 INFO L168 Benchmark]: RCFGBuilder took 587.67 ms. Allocated memory is still 202.9 MB. Free memory was 165.9 MB in the beginning and 120.4 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:03:53,050 INFO L168 Benchmark]: TraceAbstraction took 8329.71 ms. Allocated memory was 202.9 MB in the beginning and 361.8 MB in the end (delta: 158.9 MB). Free memory was 120.4 MB in the beginning and 214.9 MB in the end (delta: -94.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:03:53,056 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 747.06 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 102.1 MB in the beginning and 168.7 MB in the end (delta: -66.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.33 ms. Allocated memory is still 202.9 MB. Free memory was 168.7 MB in the beginning and 165.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 587.67 ms. Allocated memory is still 202.9 MB. Free memory was 165.9 MB in the beginning and 120.4 MB in the end (delta: 45.5 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8329.71 ms. Allocated memory was 202.9 MB in the beginning and 361.8 MB in the end (delta: 158.9 MB). Free memory was 120.4 MB in the beginning and 214.9 MB in the end (delta: -94.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] COND TRUE __VERIFIER_nondet_int() [L526] p->h = 1 [L527] t = (List) malloc(sizeof(struct node)) [L528] COND FALSE !(t == 0) [L529] p->n = t [L530] EXPR p->n [L530] p = p->n [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND TRUE __VERIFIER_nondet_int() [L533] p->h = 2 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] EXPR p->h [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h [L543] COND TRUE p->h == 1 [L544] EXPR p->n [L544] p = p->n [L543] EXPR p->h [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 451 SDslu, 944 SDs, 0 SdLazy, 1690 SolverSat, 198 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=12, 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, 12 MinimizatonAttempts, 127 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 61595 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 12/50 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...