/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:27:19,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:27:19,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:27:19,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:27:19,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:27:19,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:27:19,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:27:19,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:27:19,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:27:19,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:27:19,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:27:19,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:27:19,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:27:19,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:27:19,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:27:19,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:27:19,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:27:19,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:27:19,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:27:19,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:27:19,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:27:19,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:27:19,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:27:19,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:27:19,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:27:19,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:27:19,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:27:19,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:27:19,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:27:19,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:27:19,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:27:19,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:27:19,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:27:19,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:27:19,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:27:19,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:27:19,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:27:19,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:27:19,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:27:19,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:27:19,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:27:19,967 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:27:20,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:27:20,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:27:20,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:27:20,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:27:20,015 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:27:20,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:27:20,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:27:20,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:27:20,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:27:20,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:27:20,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:27:20,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:27:20,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:27:20,018 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:27:20,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:27:20,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:27:20,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:27:20,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:27:20,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:27:20,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:27:20,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:27:20,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:27:20,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:27:20,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:27:20,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:27:20,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:27:20,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:27:20,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:27:20,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:27:20,021 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.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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:27:20,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:27:20,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:27:20,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:27:20,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:27:20,557 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:27:20,558 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-21 12:27:20,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d6798473/628ca93e73bd4c5c98f8d927dd7162b2/FLAG0acdb6867 [2020-09-21 12:27:21,271 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:27:21,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-21 12:27:21,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d6798473/628ca93e73bd4c5c98f8d927dd7162b2/FLAG0acdb6867 [2020-09-21 12:27:21,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d6798473/628ca93e73bd4c5c98f8d927dd7162b2 [2020-09-21 12:27:21,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:27:21,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:27:21,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:21,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:27:21,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:27:21,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:21" (1/1) ... [2020-09-21 12:27:21,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef00bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:21, skipping insertion in model container [2020-09-21 12:27:21,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:21" (1/1) ... [2020-09-21 12:27:21,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:27:21,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:27:22,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:22,142 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:27:22,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:27:22,270 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:27:22,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22 WrapperNode [2020-09-21 12:27:22,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:27:22,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:27:22,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:27:22,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:27:22,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... [2020-09-21 12:27:22,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:27:22,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:27:22,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:27:22,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:27:22,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:27:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:27:22,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:27:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 12:27:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 12:27:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 12:27:22,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:27:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:27:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:27:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 12:27:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 12:27:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 12:27:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 12:27:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 12:27:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 12:27:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 12:27:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 12:27:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 12:27:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 12:27:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 12:27:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 12:27:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 12:27:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 12:27:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 12:27:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 12:27:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 12:27:22,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 12:27:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 12:27:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 12:27:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 12:27:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 12:27:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 12:27:22,436 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 12:27:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 12:27:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 12:27:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 12:27:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 12:27:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 12:27:22,437 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 12:27:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 12:27:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 12:27:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 12:27:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 12:27:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 12:27:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 12:27:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 12:27:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 12:27:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 12:27:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 12:27:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 12:27:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 12:27:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 12:27:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 12:27:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 12:27:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 12:27:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 12:27:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 12:27:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 12:27:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 12:27:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 12:27:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 12:27:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:27:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:27:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 12:27:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:27:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 12:27:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 12:27:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 12:27:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 12:27:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 12:27:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:27:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 12:27:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 12:27:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 12:27:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 12:27:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 12:27:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 12:27:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 12:27:22,444 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 12:27:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 12:27:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 12:27:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 12:27:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 12:27:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 12:27:22,445 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 12:27:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 12:27:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 12:27:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 12:27:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 12:27:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 12:27:22,446 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 12:27:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 12:27:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 12:27:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 12:27:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 12:27:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 12:27:22,447 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 12:27:22,448 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 12:27:22,449 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:27:22,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:27:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:27:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:27:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:27:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:27:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:27:22,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:27:22,794 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 12:27:23,212 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:27:23,212 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-21 12:27:23,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:23 BoogieIcfgContainer [2020-09-21 12:27:23,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:27:23,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:27:23,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:27:23,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:27:23,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:27:21" (1/3) ... [2020-09-21 12:27:23,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:23, skipping insertion in model container [2020-09-21 12:27:23,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:22" (2/3) ... [2020-09-21 12:27:23,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b3cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:23, skipping insertion in model container [2020-09-21 12:27:23,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:23" (3/3) ... [2020-09-21 12:27:23,228 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-21 12:27:23,241 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:27:23,252 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:27:23,272 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:27:23,300 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:27:23,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:27:23,301 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:27:23,301 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:27:23,301 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:27:23,301 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:27:23,301 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:27:23,302 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:27:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-09-21 12:27:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:27:23,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:23,335 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] [2020-09-21 12:27:23,336 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-09-21 12:27:23,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:23,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822675386] [2020-09-21 12:27:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:23,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:24,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:24,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:27:24,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:27:24,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-09-21 12:27:24,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:24,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:27:24,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:24,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:27:24,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:24,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:24,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:24,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:24,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:24,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:24,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:24,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:24,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822675386] [2020-09-21 12:27:24,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:24,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:27:24,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947397869] [2020-09-21 12:27:24,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:27:24,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:27:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:27:24,270 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-09-21 12:27:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:24,499 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-09-21 12:27:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:27:24,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 12:27:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:24,516 INFO L225 Difference]: With dead ends: 108 [2020-09-21 12:27:24,516 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 12:27:24,521 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 [2020-09-21 12:27:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 12:27:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-21 12:27:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:27:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-09-21 12:27:24,577 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-09-21 12:27:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:24,578 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-09-21 12:27:24,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:27:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-09-21 12:27:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:27:24,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:24,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:24,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:27:24,580 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:24,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-09-21 12:27:24,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:24,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146439095] [2020-09-21 12:27:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:24,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:24,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:27:24,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-21 12:27:24,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:24,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:27:24,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:27:24,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:27:24,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:24,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:24,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:24,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:24,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:27:24,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:24,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146439095] [2020-09-21 12:27:24,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:24,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:27:24,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263077092] [2020-09-21 12:27:24,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:27:24,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:24,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:27:24,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:27:24,864 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-09-21 12:27:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:25,014 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-09-21 12:27:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:27:25,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-09-21 12:27:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:25,018 INFO L225 Difference]: With dead ends: 75 [2020-09-21 12:27:25,018 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 12:27:25,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:27:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 12:27:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-21 12:27:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 12:27:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-09-21 12:27:25,032 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-09-21 12:27:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:25,032 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-09-21 12:27:25,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:27:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-09-21 12:27:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:27:25,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:25,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:25,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:27:25,035 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:25,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:25,036 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-09-21 12:27:25,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:25,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068480728] [2020-09-21 12:27:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:25,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:25,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:25,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:25,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 12:27:25,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:27:25,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 755 [2020-09-21 12:27:25,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:27:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:27:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:27:25,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:25,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:25,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:25,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:25,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:25,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:27:25,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:25,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:25,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:25,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:25,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:27:25,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068480728] [2020-09-21 12:27:25,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:25,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:27:25,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870070284] [2020-09-21 12:27:25,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:27:25,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:27:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:27:25,866 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-09-21 12:27:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:26,005 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-09-21 12:27:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:27:26,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-09-21 12:27:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:26,007 INFO L225 Difference]: With dead ends: 93 [2020-09-21 12:27:26,007 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 12:27:26,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:27:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 12:27:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-21 12:27:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 12:27:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-09-21 12:27:26,017 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-09-21 12:27:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:26,018 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-09-21 12:27:26,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:27:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-09-21 12:27:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:27:26,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:26,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:26,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:27:26,020 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-09-21 12:27:26,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:26,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277466330] [2020-09-21 12:27:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:26,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:26,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 12:27:26,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:26,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-21 12:27:26,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:26,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 12:27:26,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:27:26,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:26,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:26,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:26,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:26,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:26,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:26,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:27:26,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:26,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:26,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:26,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:26,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:26,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277466330] [2020-09-21 12:27:26,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:26,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:27:26,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130342865] [2020-09-21 12:27:26,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:27:26,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:27:26,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:26,257 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-09-21 12:27:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:26,464 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-09-21 12:27:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:27:26,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-21 12:27:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:26,466 INFO L225 Difference]: With dead ends: 82 [2020-09-21 12:27:26,466 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 12:27:26,467 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 [2020-09-21 12:27:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 12:27:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-09-21 12:27:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 12:27:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-09-21 12:27:26,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-09-21 12:27:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:26,476 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-09-21 12:27:26,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:27:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-09-21 12:27:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 12:27:26,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:26,478 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:26,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:27:26,479 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-09-21 12:27:26,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:26,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177997493] [2020-09-21 12:27:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:26,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:27:26,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:26,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-21 12:27:26,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 12:27:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:27:26,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:26,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:26,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:26,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:26,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:26,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:27:26,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:26,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:26,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177997493] [2020-09-21 12:27:26,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:26,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:27:26,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047703660] [2020-09-21 12:27:26,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:27:26,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:27:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:26,754 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-09-21 12:27:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:26,965 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-09-21 12:27:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:27:26,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 12:27:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:26,968 INFO L225 Difference]: With dead ends: 84 [2020-09-21 12:27:26,969 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 12:27:26,969 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 [2020-09-21 12:27:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 12:27:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-09-21 12:27:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 12:27:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-09-21 12:27:26,981 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-09-21 12:27:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:26,982 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-09-21 12:27:26,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:27:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-09-21 12:27:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 12:27:26,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:26,984 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:26,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:27:26,984 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-09-21 12:27:26,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:26,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481394273] [2020-09-21 12:27:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:27,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:27,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 12:27:27,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:27,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-21 12:27:27,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:27:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-21 12:27:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:27:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:27,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:27,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:27,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:27,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:27,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:27:27,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:27,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:27,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:27,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481394273] [2020-09-21 12:27:27,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:27:27,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:27:27,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875680006] [2020-09-21 12:27:27,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:27:27,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:27,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:27:27,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:27:27,218 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-09-21 12:27:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:27,411 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-09-21 12:27:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:27:27,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 12:27:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:27,413 INFO L225 Difference]: With dead ends: 84 [2020-09-21 12:27:27,413 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 12:27:27,414 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 [2020-09-21 12:27:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 12:27:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-09-21 12:27:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 12:27:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-09-21 12:27:27,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-09-21 12:27:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:27,422 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-09-21 12:27:27,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:27:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-09-21 12:27:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 12:27:27,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:27,424 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:27,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:27:27,424 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-09-21 12:27:27,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:27,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296134259] [2020-09-21 12:27:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:27,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:28,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:28,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:27:28,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:28,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-09-21 12:27:28,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:28,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:27:28,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:27:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:28,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:28,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:28,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:28,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:28,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:28,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:28,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:28,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:28,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:28,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296134259] [2020-09-21 12:27:28,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:28,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:27:28,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393802899] [2020-09-21 12:27:28,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:27:28,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:27:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:27:28,283 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-09-21 12:27:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:28,779 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-09-21 12:27:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:27:28,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-21 12:27:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:28,780 INFO L225 Difference]: With dead ends: 86 [2020-09-21 12:27:28,781 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 12:27:28,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:27:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 12:27:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-09-21 12:27:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 12:27:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-09-21 12:27:28,798 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-09-21 12:27:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:28,799 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-09-21 12:27:28,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:27:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-09-21 12:27:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 12:27:28,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:28,800 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:28,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:27:28,803 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-09-21 12:27:28,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:28,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690158921] [2020-09-21 12:27:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:29,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:29,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:29,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:27:29,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:27:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-09-21 12:27:29,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:27:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:29,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:27:29,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:29,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:29,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:29,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:29,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:29,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:29,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:29,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:29,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:29,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:29,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:29,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:29,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690158921] [2020-09-21 12:27:29,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:29,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:27:29,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998739623] [2020-09-21 12:27:29,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:27:29,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:29,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:27:29,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:27:29,467 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-09-21 12:27:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:29,842 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-09-21 12:27:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:27:29,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-21 12:27:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:29,844 INFO L225 Difference]: With dead ends: 95 [2020-09-21 12:27:29,844 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 12:27:29,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:27:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 12:27:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-09-21 12:27:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 12:27:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-09-21 12:27:29,865 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-09-21 12:27:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:29,865 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-09-21 12:27:29,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:27:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-09-21 12:27:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 12:27:29,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:29,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:29,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:27:29,867 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:29,868 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-09-21 12:27:29,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:29,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411336577] [2020-09-21 12:27:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 12:27:30,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-09-21 12:27:30,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:27:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:30,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:27:30,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:30,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:30,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:30,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:30,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:30,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:27:30,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:30,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:30,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:30,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:30,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:30,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411336577] [2020-09-21 12:27:30,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:30,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:27:30,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857878735] [2020-09-21 12:27:30,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:27:30,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:27:30,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:27:30,528 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-09-21 12:27:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:31,001 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-09-21 12:27:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:31,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-21 12:27:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:31,003 INFO L225 Difference]: With dead ends: 99 [2020-09-21 12:27:31,004 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 12:27:31,004 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 [2020-09-21 12:27:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 12:27:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-09-21 12:27:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 12:27:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-09-21 12:27:31,011 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-09-21 12:27:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:31,012 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-09-21 12:27:31,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:27:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-09-21 12:27:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 12:27:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:31,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:31,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:27:31,014 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-09-21 12:27:31,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:31,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628620348] [2020-09-21 12:27:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:27:31,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-09-21 12:27:31,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:27:31,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:31,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:27:31,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:31,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:31,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:31,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:31,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:31,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:31,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:31,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:31,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628620348] [2020-09-21 12:27:31,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:31,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:27:31,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470890153] [2020-09-21 12:27:31,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:27:31,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:27:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:27:31,581 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-09-21 12:27:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:32,066 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-09-21 12:27:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:32,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-21 12:27:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:32,068 INFO L225 Difference]: With dead ends: 101 [2020-09-21 12:27:32,068 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 12:27:32,069 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 [2020-09-21 12:27:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 12:27:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-09-21 12:27:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 12:27:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-09-21 12:27:32,076 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-09-21 12:27:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:32,076 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-09-21 12:27:32,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:27:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-09-21 12:27:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 12:27:32,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:32,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:32,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:27:32,078 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:32,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-09-21 12:27:32,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:32,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385844301] [2020-09-21 12:27:32,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:27:32,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-09-21 12:27:32,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:27:32,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:27:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:32,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:32,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:32,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:32,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:32,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:32,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:32,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:32,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:32,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385844301] [2020-09-21 12:27:32,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:32,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:27:32,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707964056] [2020-09-21 12:27:32,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:27:32,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:27:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:27:32,718 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-09-21 12:27:33,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:33,136 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-09-21 12:27:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:33,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-21 12:27:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:33,138 INFO L225 Difference]: With dead ends: 94 [2020-09-21 12:27:33,138 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 12:27:33,139 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 [2020-09-21 12:27:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 12:27:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-21 12:27:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 12:27:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-09-21 12:27:33,143 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-09-21 12:27:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:33,144 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-09-21 12:27:33,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:27:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-09-21 12:27:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 12:27:33,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:33,145 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:33,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:27:33,146 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-09-21 12:27:33,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:33,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120466065] [2020-09-21 12:27:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:33,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:27:33,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:33,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-09-21 12:27:33,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:27:33,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:33,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:27:33,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:33,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:33,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:33,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:33,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:33,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:33,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:27:33,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:33,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:33,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:33,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120466065] [2020-09-21 12:27:33,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:33,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:27:33,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491381312] [2020-09-21 12:27:33,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:27:33,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:27:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:33,832 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 11 states. [2020-09-21 12:27:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:34,228 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2020-09-21 12:27:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:27:34,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-21 12:27:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:34,229 INFO L225 Difference]: With dead ends: 92 [2020-09-21 12:27:34,229 INFO L226 Difference]: Without dead ends: 86 [2020-09-21 12:27:34,230 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 [2020-09-21 12:27:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-21 12:27:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-09-21 12:27:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 12:27:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2020-09-21 12:27:34,237 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 39 [2020-09-21 12:27:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:34,238 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2020-09-21 12:27:34,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:27:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2020-09-21 12:27:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 12:27:34,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:34,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:34,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:27:34,240 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:34,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:34,240 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-09-21 12:27:34,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:34,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230261795] [2020-09-21 12:27:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:27:34,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-09-21 12:27:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:27:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:27:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:34,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:34,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:34,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:34,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:34,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:34,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:34,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:34,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:34,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230261795] [2020-09-21 12:27:34,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:34,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:27:34,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824462993] [2020-09-21 12:27:34,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:27:34,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:27:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:27:34,927 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand 11 states. [2020-09-21 12:27:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:35,277 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-09-21 12:27:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:27:35,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-21 12:27:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:35,279 INFO L225 Difference]: With dead ends: 86 [2020-09-21 12:27:35,279 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 12:27:35,279 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 [2020-09-21 12:27:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 12:27:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-09-21 12:27:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 12:27:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-09-21 12:27:35,294 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 39 [2020-09-21 12:27:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:35,294 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-09-21 12:27:35,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:27:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-09-21 12:27:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 12:27:35,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:35,295 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:35,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:27:35,298 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-09-21 12:27:35,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:35,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743776952] [2020-09-21 12:27:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:35,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:35,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:35,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-21 12:27:35,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:35,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-09-21 12:27:35,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:35,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:27:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:27:35,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:27:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:27:36,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:27:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:27:36,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:27:36,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:27:36,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:27:36,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:27:36,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:27:36,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:27:36,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:27:36,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:27:36,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:27:36,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:27:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:27:36,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743776952] [2020-09-21 12:27:36,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:27:36,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:27:36,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751025586] [2020-09-21 12:27:36,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:27:36,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:27:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:27:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:27:36,310 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 12 states. [2020-09-21 12:27:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:27:37,266 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-09-21 12:27:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 12:27:37,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-21 12:27:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:27:37,268 INFO L225 Difference]: With dead ends: 118 [2020-09-21 12:27:37,268 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 12:27:37,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-09-21 12:27:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 12:27:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2020-09-21 12:27:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 12:27:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2020-09-21 12:27:37,275 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 41 [2020-09-21 12:27:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:27:37,276 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2020-09-21 12:27:37,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:27:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2020-09-21 12:27:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 12:27:37,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:27:37,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:27:37,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:27:37,277 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:27:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:27:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-09-21 12:27:37,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:27:37,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409992489] [2020-09-21 12:27:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:27:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:27:37,305 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:27:37,305 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:27:37,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:27:37,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:27:37 BoogieIcfgContainer [2020-09-21 12:27:37,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:27:37,338 INFO L168 Benchmark]: Toolchain (without parser) took 15788.08 ms. Allocated memory was 140.0 MB in the beginning and 367.5 MB in the end (delta: 227.5 MB). Free memory was 101.9 MB in the beginning and 238.3 MB in the end (delta: -136.4 MB). Peak memory consumption was 91.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:37,339 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:27:37,340 INFO L168 Benchmark]: CACSL2BoogieTranslator took 715.52 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 101.2 MB in the beginning and 170.4 MB in the end (delta: -69.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:37,340 INFO L168 Benchmark]: Boogie Preprocessor took 83.74 ms. Allocated memory is still 204.5 MB. Free memory was 170.4 MB in the beginning and 167.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:37,341 INFO L168 Benchmark]: RCFGBuilder took 860.85 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 110.5 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:37,342 INFO L168 Benchmark]: TraceAbstraction took 14115.37 ms. Allocated memory was 204.5 MB in the beginning and 367.5 MB in the end (delta: 163.1 MB). Free memory was 109.8 MB in the beginning and 238.3 MB in the end (delta: -128.4 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:27:37,345 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 715.52 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 101.2 MB in the beginning and 170.4 MB in the end (delta: -69.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.74 ms. Allocated memory is still 204.5 MB. Free memory was 170.4 MB in the beginning and 167.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 860.85 ms. Allocated memory is still 204.5 MB. Free memory was 167.1 MB in the beginning and 110.5 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14115.37 ms. Allocated memory was 204.5 MB in the beginning and 367.5 MB in the end (delta: 163.1 MB). Free memory was 109.8 MB in the beginning and 238.3 MB in the end (delta: -128.4 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.0s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 796 SDtfs, 510 SDslu, 2712 SDs, 0 SdLazy, 2549 SolverSat, 214 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 125 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 518 NumberOfCodeBlocks, 518 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 463 ConstructedInterpolants, 0 QuantifiedInterpolants, 98904 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 22/60 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...