/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:38:26,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:38:26,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:38:26,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:38:26,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:38:26,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:38:26,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:38:26,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:38:26,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:38:26,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:38:26,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:38:26,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:38:26,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:38:26,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:38:26,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:38:26,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:38:26,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:38:26,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:38:26,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:38:26,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:38:26,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:38:26,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:38:26,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:38:26,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:38:26,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:38:26,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:38:26,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:38:26,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:38:26,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:38:26,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:38:26,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:38:26,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:38:26,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:38:26,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:38:26,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:38:26,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:38:26,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:38:26,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:38:26,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:38:26,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:38:26,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:38:26,947 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 [2020-09-24 21:38:26,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:38:26,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:38:26,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:38:26,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:38:26,978 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:38:26,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:38:26,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:38:26,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:38:26,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:38:26,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:38:26,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:38:26,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:38:26,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:38:26,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:38:26,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:38:26,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:38:26,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:38:26,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:38:26,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:38:26,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:38:26,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:38:26,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:38:26,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:38:26,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:38:26,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:38:26,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:38:26,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:38:26,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:38:26,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:38:26,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;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=5000;interpolation-heuristic=LOWLEXORDER;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=5000;interpolation-heuristic=LOWLEXORDER;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=5000;interpolation-heuristic=LOWLEXORDER;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=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:38:27,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:38:27,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:38:27,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:38:27,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:38:27,468 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:38:27,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-09-24 21:38:27,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f08fa32/c765df23c03d464f8664e4895cc7cbe7/FLAG29fbb5a2b [2020-09-24 21:38:28,201 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:38:28,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-simple/dll2n_remove_all.i [2020-09-24 21:38:28,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f08fa32/c765df23c03d464f8664e4895cc7cbe7/FLAG29fbb5a2b [2020-09-24 21:38:28,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/83f08fa32/c765df23c03d464f8664e4895cc7cbe7 [2020-09-24 21:38:28,483 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:38:28,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:38:28,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:28,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:38:28,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:38:28,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:28" (1/1) ... [2020-09-24 21:38:28,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d6c99e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:28, skipping insertion in model container [2020-09-24 21:38:28,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:28" (1/1) ... [2020-09-24 21:38:28,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:38:28,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:38:29,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:29,068 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:38:29,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:29,189 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:38:29,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29 WrapperNode [2020-09-24 21:38:29,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:29,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:38:29,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:38:29,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:38:29,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (1/1) ... [2020-09-24 21:38:29,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:38:29,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:38:29,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:38:29,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:38:29,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (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 [2020-09-24 21:38:29,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:38:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:38:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 21:38:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 21:38:29,365 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 21:38:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2020-09-24 21:38:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-09-24 21:38:29,366 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2020-09-24 21:38:29,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:38:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:38:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 21:38:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 21:38:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 21:38:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 21:38:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 21:38:29,369 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 21:38:29,369 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 21:38:29,369 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 21:38:29,369 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 21:38:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 21:38:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 21:38:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 21:38:29,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 21:38:29,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 21:38:29,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 21:38:29,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 21:38:29,371 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 21:38:29,372 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 21:38:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 21:38:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 21:38:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 21:38:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 21:38:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 21:38:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 21:38:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 21:38:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 21:38:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 21:38:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 21:38:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 21:38:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 21:38:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 21:38:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:38:29,378 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 21:38:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 21:38:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 21:38:29,379 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 21:38:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 21:38:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 21:38:29,380 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 21:38:29,381 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 21:38:29,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:38:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 21:38:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 21:38:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 21:38:29,383 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:38:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 21:38:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 21:38:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 21:38:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 21:38:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 21:38:29,384 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 21:38:29,385 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 21:38:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 21:38:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 21:38:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 21:38:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 21:38:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 21:38:29,386 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 21:38:29,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 21:38:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 21:38:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 21:38:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 21:38:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 21:38:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 21:38:29,388 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 21:38:29,389 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 21:38:29,390 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 21:38:29,391 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2020-09-24 21:38:29,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:38:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:38:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:38:29,392 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-09-24 21:38:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2020-09-24 21:38:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:38:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:38:29,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:38:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:38:29,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-24 21:38:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:38:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:38:29,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:38:29,778 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 21:38:30,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:38:30,034 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:38:30,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:30 BoogieIcfgContainer [2020-09-24 21:38:30,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:38:30,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:38:30,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:38:30,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:38:30,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:38:28" (1/3) ... [2020-09-24 21:38:30,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9deacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:30, skipping insertion in model container [2020-09-24 21:38:30,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:29" (2/3) ... [2020-09-24 21:38:30,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9deacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:30, skipping insertion in model container [2020-09-24 21:38:30,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:30" (3/3) ... [2020-09-24 21:38:30,068 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2020-09-24 21:38:30,081 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:38:30,094 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:38:30,118 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:38:30,158 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:38:30,158 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:38:30,159 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:38:30,159 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:38:30,159 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:38:30,159 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:38:30,159 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:38:30,159 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:38:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-09-24 21:38:30,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 21:38:30,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:30,197 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] [2020-09-24 21:38:30,197 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:30,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1728925643, now seen corresponding path program 1 times [2020-09-24 21:38:30,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:30,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345248005] [2020-09-24 21:38:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:30,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:30,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:31,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:31,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 21:38:31,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:38:31,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-09-24 21:38:31,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:38:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:38:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:38:31,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:38:31,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:31,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:31,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:31,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:31,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:38:31,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:31,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:31,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:38:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:31,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:31,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:38:31,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:31,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:38:31,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:38:31,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:38:31,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:38:31,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:31,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345248005] [2020-09-24 21:38:31,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:31,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:38:31,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109018549] [2020-09-24 21:38:31,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:38:31,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:38:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:38:31,405 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 7 states. [2020-09-24 21:38:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:31,789 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-09-24 21:38:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:38:31,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-24 21:38:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:31,804 INFO L225 Difference]: With dead ends: 129 [2020-09-24 21:38:31,804 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 21:38:31,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:38:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 21:38:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2020-09-24 21:38:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 21:38:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-24 21:38:31,867 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 27 [2020-09-24 21:38:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:31,868 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-24 21:38:31,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:38:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-24 21:38:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 21:38:31,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:31,871 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:31,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:38:31,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1632096868, now seen corresponding path program 1 times [2020-09-24 21:38:31,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:31,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682191807] [2020-09-24 21:38:31,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:32,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:32,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:32,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 21:38:32,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:38:32,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-09-24 21:38:32,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:38:32,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:38:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:38:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:32,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:32,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:32,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:32,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:32,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:32,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:38:32,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:32,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:32,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:32,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:32,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:38:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:32,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:33,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:33,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:38:33,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:33,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-09-24 21:38:33,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:33,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:38:33,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:38:33,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 21:38:33,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:33,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682191807] [2020-09-24 21:38:33,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:33,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:38:33,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929537844] [2020-09-24 21:38:33,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:38:33,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:38:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:38:33,167 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 9 states. [2020-09-24 21:38:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:33,572 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2020-09-24 21:38:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:38:33,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-09-24 21:38:33,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:33,575 INFO L225 Difference]: With dead ends: 105 [2020-09-24 21:38:33,575 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 21:38:33,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:38:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 21:38:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-09-24 21:38:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 21:38:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-09-24 21:38:33,601 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 39 [2020-09-24 21:38:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:33,602 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-09-24 21:38:33,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:38:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-09-24 21:38:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 21:38:33,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:33,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:38:33,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:38:33,607 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash -337996148, now seen corresponding path program 2 times [2020-09-24 21:38:33,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:33,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137243417] [2020-09-24 21:38:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:33,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:33,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:35,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:35,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:38:35,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:38:35,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2296 [2020-09-24 21:38:35,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:35,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:38:35,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:38:35,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:38:35,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:35,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:35,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:35,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:35,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:35,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:38:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:36,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:36,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:36,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:36,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:36,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 21:38:36,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:38:36,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-09-24 21:38:36,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:36,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:38:36,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:36,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:38:36,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:36,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137243417] [2020-09-24 21:38:36,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:36,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:38:36,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427924295] [2020-09-24 21:38:36,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:38:36,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:38:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:38:36,880 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 10 states. [2020-09-24 21:38:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:37,295 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-09-24 21:38:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:38:37,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-09-24 21:38:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:37,298 INFO L225 Difference]: With dead ends: 94 [2020-09-24 21:38:37,299 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 21:38:37,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:38:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 21:38:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2020-09-24 21:38:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 21:38:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-09-24 21:38:37,315 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 51 [2020-09-24 21:38:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:37,316 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-09-24 21:38:37,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:38:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-09-24 21:38:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 21:38:37,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:37,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:37,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:38:37,318 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:37,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1405943230, now seen corresponding path program 1 times [2020-09-24 21:38:37,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:37,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496319892] [2020-09-24 21:38:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:37,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:38,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:39,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:39,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:40,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:42,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:42,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:38:42,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:38:42,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 21:38:42,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:38:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:38:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:38:42,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:42,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:42,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:42,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:42,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:42,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:42,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:42,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:38:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:42,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:42,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:42,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:43,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:43,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 21:38:43,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:38:43,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-09-24 21:38:43,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:43,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:38:43,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:43,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:38:43,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:43,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:38:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:43,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:43,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:43,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:38:43,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:43,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:38:43,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:38:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:38:43,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:43,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496319892] [2020-09-24 21:38:43,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:43,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:38:43,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874682191] [2020-09-24 21:38:43,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:38:43,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:38:43,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:38:43,503 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 13 states. [2020-09-24 21:38:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:44,045 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-09-24 21:38:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:38:44,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-09-24 21:38:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:44,048 INFO L225 Difference]: With dead ends: 96 [2020-09-24 21:38:44,048 INFO L226 Difference]: Without dead ends: 91 [2020-09-24 21:38:44,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:38:44,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-24 21:38:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-24 21:38:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 21:38:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-24 21:38:44,073 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 69 [2020-09-24 21:38:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:44,074 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-24 21:38:44,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:38:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-24 21:38:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 21:38:44,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:44,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:38:44,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:38:44,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:44,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1955081336, now seen corresponding path program 2 times [2020-09-24 21:38:44,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:44,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021329048] [2020-09-24 21:38:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:44,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:45,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:46,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:46,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:49,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:49,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 21:38:49,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:38:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:38:49,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:38:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 21:38:49,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:38:49,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:49,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:49,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:49,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:49,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:49,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:49,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:49,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:49,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:49,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:38:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:49,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:49,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:50,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:50,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 21:38:50,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:38:50,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-09-24 21:38:50,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:38:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:50,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:38:50,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:50,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:38:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:50,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:50,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:50,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:38:50,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:50,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 21:38:50,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:50,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:38:50,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:38:50,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:38:50,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:50,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 21:38:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:50,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:50,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:38:50,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:38:50,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:50,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 21:38:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:50,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 21:38:50,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021329048] [2020-09-24 21:38:50,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:50,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:38:50,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608122448] [2020-09-24 21:38:50,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:38:50,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:50,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:38:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:38:50,586 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 18 states. [2020-09-24 21:38:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:51,806 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-09-24 21:38:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:38:51,806 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-09-24 21:38:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:51,810 INFO L225 Difference]: With dead ends: 138 [2020-09-24 21:38:51,813 INFO L226 Difference]: Without dead ends: 88 [2020-09-24 21:38:51,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:38:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-24 21:38:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-24 21:38:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 21:38:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-09-24 21:38:51,832 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 87 [2020-09-24 21:38:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:51,832 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-09-24 21:38:51,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:38:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-09-24 21:38:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 21:38:51,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:51,837 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2020-09-24 21:38:51,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:38:51,839 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash 651894158, now seen corresponding path program 1 times [2020-09-24 21:38:51,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:51,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335615744] [2020-09-24 21:38:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:52,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:54,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:56,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:56,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 21:38:56,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:38:56,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-24 21:38:56,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-24 21:38:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:38:56,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 21:38:56,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:57,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:57,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:57,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:57,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:57,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:57,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:57,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:57,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:57,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:57,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:57,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:38:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:57,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:59,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:59,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:38:59,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:59,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1935 [2020-09-24 21:38:59,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:38:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 21:38:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:00,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 21:39:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:00,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:00,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:00,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:39:00,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:00,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-09-24 21:39:00,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:00,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:39:00,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:00,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:39:00,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:01,251 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-09-24 21:39:01,564 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-09-24 21:39:01,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 21:39:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:01,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:01,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:01,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:39:01,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:01,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-24 21:39:01,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:39:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:39:01,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 21:39:02,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335615744] [2020-09-24 21:39:02,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:02,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 21:39:02,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146201279] [2020-09-24 21:39:02,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 21:39:02,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 21:39:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:39:02,086 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 29 states. [2020-09-24 21:39:04,760 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-09-24 21:39:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:05,198 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2020-09-24 21:39:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 21:39:05,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 89 [2020-09-24 21:39:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:05,201 INFO L225 Difference]: With dead ends: 183 [2020-09-24 21:39:05,201 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 21:39:05,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 21:39:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 21:39:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2020-09-24 21:39:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-24 21:39:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-09-24 21:39:05,216 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 89 [2020-09-24 21:39:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:05,217 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-09-24 21:39:05,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 21:39:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-09-24 21:39:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 21:39:05,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:05,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:39:05,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:39:05,219 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1167974453, now seen corresponding path program 1 times [2020-09-24 21:39:05,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:05,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059348828] [2020-09-24 21:39:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:05,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:07,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:08,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:10,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:39:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:10,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:10,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:10,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:10,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:39:10,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:10,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:39:10,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:10,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:39:10,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:10,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:39:10,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:10,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:39:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:10,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:11,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:11,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:11,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:39:11,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:11,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-24 21:39:11,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:39:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:11,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 21:39:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:12,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-24 21:39:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:12,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:12,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:12,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:39:12,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:12,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-09-24 21:39:12,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:39:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:39:12,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0