/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:05:44,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:05:44,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:05:44,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:05:44,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:05:44,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:05:44,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:05:44,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:05:44,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:05:44,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:05:44,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:05:44,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:05:44,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:05:44,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:05:44,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:05:44,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:05:44,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:05:44,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:05:44,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:05:44,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:05:44,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:05:44,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:05:44,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:05:44,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:05:44,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:05:44,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:05:44,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:05:44,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:05:44,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:05:44,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:05:44,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:05:44,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:05:44,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:05:44,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:05:44,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:05:44,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:05:44,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:05:44,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:05:44,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:05:44,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:05:44,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:05:44,547 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 [2020-09-25 10:05:44,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:05:44,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:05:44,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:05:44,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:05:44,604 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:05:44,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:05:44,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:05:44,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:05:44,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:05:44,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:05:44,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:05:44,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:05:44,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:05:44,608 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:05:44,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:05:44,608 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:05:44,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:05:44,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:05:44,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:05:44,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:05:44,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:05:44,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:05:44,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:05:44,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:05:44,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:05:44,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:05:44,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:05:44,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:05:44,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:05:44,611 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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:05:45,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:05:45,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:05:45,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:05:45,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:05:45,094 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:05:45,095 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 10:05:45,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad52c0d64/f840b0b1c4804adaa2d43e664190d722/FLAG4f841ae77 [2020-09-25 10:05:45,832 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:05:45,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-09-25 10:05:45,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad52c0d64/f840b0b1c4804adaa2d43e664190d722/FLAG4f841ae77 [2020-09-25 10:05:46,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad52c0d64/f840b0b1c4804adaa2d43e664190d722 [2020-09-25 10:05:46,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:05:46,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:05:46,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:05:46,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:05:46,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:05:46,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dceca50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46, skipping insertion in model container [2020-09-25 10:05:46,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:05:46,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:05:46,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:05:46,638 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:05:46,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:05:46,746 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:05:46,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46 WrapperNode [2020-09-25 10:05:46,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:05:46,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:05:46,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:05:46,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:05:46,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (1/1) ... [2020-09-25 10:05:46,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:05:46,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:05:46,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:05:46,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:05:46,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (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 [2020-09-25 10:05:46,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:05:46,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:05:46,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 10:05:46,918 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 10:05:46,919 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 10:05:46,919 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-25 10:05:46,919 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-25 10:05:46,919 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-25 10:05:46,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:05:46,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:05:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:05:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 10:05:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 10:05:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 10:05:46,920 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 10:05:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 10:05:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 10:05:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 10:05:46,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 10:05:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 10:05:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 10:05:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 10:05:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 10:05:46,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 10:05:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 10:05:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 10:05:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 10:05:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 10:05:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 10:05:46,923 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 10:05:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 10:05:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 10:05:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 10:05:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 10:05:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 10:05:46,924 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 10:05:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 10:05:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 10:05:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 10:05:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 10:05:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 10:05:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 10:05:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 10:05:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 10:05:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 10:05:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 10:05:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 10:05:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 10:05:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 10:05:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 10:05:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 10:05:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 10:05:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 10:05:46,928 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 10:05:46,929 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 10:05:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-25 10:05:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 10:05:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 10:05:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 10:05:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 10:05:46,930 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:05:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 10:05:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 10:05:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 10:05:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:05:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 10:05:46,931 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 10:05:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 10:05:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 10:05:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 10:05:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 10:05:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 10:05:46,932 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 10:05:46,933 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 10:05:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 10:05:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 10:05:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 10:05:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 10:05:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 10:05:46,934 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 10:05:46,935 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 10:05:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 10:05:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 10:05:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 10:05:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 10:05:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 10:05:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 10:05:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 10:05:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 10:05:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 10:05:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 10:05:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 10:05:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 10:05:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-25 10:05:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 10:05:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 10:05:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-25 10:05:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 10:05:46,938 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-25 10:05:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 10:05:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:05:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:05:46,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:05:47,311 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 10:05:47,515 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:05:47,516 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-25 10:05:47,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:05:47 BoogieIcfgContainer [2020-09-25 10:05:47,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:05:47,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:05:47,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:05:47,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:05:47,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:05:46" (1/3) ... [2020-09-25 10:05:47,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dfae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:05:47, skipping insertion in model container [2020-09-25 10:05:47,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:05:46" (2/3) ... [2020-09-25 10:05:47,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dfae9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:05:47, skipping insertion in model container [2020-09-25 10:05:47,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:05:47" (3/3) ... [2020-09-25 10:05:47,531 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-09-25 10:05:47,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:05:47,549 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:05:47,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:05:47,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:05:47,598 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:05:47,598 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:05:47,598 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:05:47,598 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:05:47,599 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:05:47,599 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:05:47,599 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:05:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-09-25 10:05:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 10:05:47,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:05:47,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:05:47,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:05:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:05:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-09-25 10:05:47,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:05:47,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315711087] [2020-09-25 10:05:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:05:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:47,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:48,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:48,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 10:05:48,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:05:48,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-09-25 10:05:48,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:48,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:05:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:05:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:05:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:05:48,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:05:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:48,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:48,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:48,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:05:48,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 10:05:48,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:48,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:05:48,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:48,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:48,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 10:05:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:48,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:48,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:05:48,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 10:05:48,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:48,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:05:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:05:48,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:05:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:48,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 10:05:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:48,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:48,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:48,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:05:48,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:48,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:05:48,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:48,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:48,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 10:05:48,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:48,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:05:48,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315711087] [2020-09-25 10:05:48,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:05:48,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 10:05:48,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622119863] [2020-09-25 10:05:48,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:05:48,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:05:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:05:48,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:05:48,561 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 7 states. [2020-09-25 10:05:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:05:49,115 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2020-09-25 10:05:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 10:05:49,117 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 10:05:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:05:49,131 INFO L225 Difference]: With dead ends: 186 [2020-09-25 10:05:49,131 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 10:05:49,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:05:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 10:05:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-09-25 10:05:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 10:05:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-09-25 10:05:49,260 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 29 [2020-09-25 10:05:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:05:49,260 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-09-25 10:05:49,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:05:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-09-25 10:05:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 10:05:49,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:05:49,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:05:49,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:05:49,269 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:05:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:05:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2090477770, now seen corresponding path program 1 times [2020-09-25 10:05:49,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:05:49,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096212033] [2020-09-25 10:05:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:05:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:49,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:49,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:49,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:49,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:50,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:52,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 10:05:52,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:05:52,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2808 [2020-09-25 10:05:52,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:52,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:05:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:05:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 10:05:52,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:52,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:05:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:52,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:05:52,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:52,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:05:52,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:52,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:05:52,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:52,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:05:52,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 10:05:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:52,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:52,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:05:52,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:52,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 10:05:52,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:52,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:05:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:05:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:05:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:52,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:05:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:52,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:52,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:05:52,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:52,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:05:52,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:52,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:52,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 10:05:52,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:52,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:05:52,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096212033] [2020-09-25 10:05:52,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:05:52,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 10:05:52,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238697631] [2020-09-25 10:05:52,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:05:52,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:05:52,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:05:52,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:05:52,280 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 9 states. [2020-09-25 10:05:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:05:52,740 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2020-09-25 10:05:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:05:52,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-25 10:05:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:05:52,742 INFO L225 Difference]: With dead ends: 106 [2020-09-25 10:05:52,744 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 10:05:52,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:05:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 10:05:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2020-09-25 10:05:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 10:05:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-09-25 10:05:52,764 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 41 [2020-09-25 10:05:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:05:52,765 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-09-25 10:05:52,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:05:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-09-25 10:05:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 10:05:52,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:05:52,770 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, 1, 1, 1] [2020-09-25 10:05:52,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:05:52,770 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:05:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:05:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1545332509, now seen corresponding path program 1 times [2020-09-25 10:05:52,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:05:52,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921894466] [2020-09-25 10:05:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:05:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:52,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:54,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:56,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:57,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:57,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 10:05:57,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:05:57,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 10:05:57,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:57,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:05:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 10:05:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 10:05:57,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:57,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:05:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:57,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:57,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:05:57,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:05:57,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:57,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:05:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:57,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 10:05:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:57,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:57,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:57,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 10:05:57,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 10:05:57,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:57,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:57,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:05:57,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:05:57,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:05:57,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:58,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-25 10:05:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:58,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:58,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:58,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:05:58,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:58,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 10:05:58,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:58,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:58,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 10:05:58,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:05:58,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:05:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:05:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:05:58,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921894466] [2020-09-25 10:05:58,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:05:58,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 10:05:58,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436625178] [2020-09-25 10:05:58,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 10:05:58,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:05:58,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 10:05:58,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:05:58,202 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 13 states. [2020-09-25 10:05:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:05:58,762 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-09-25 10:05:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 10:05:58,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-09-25 10:05:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:05:58,770 INFO L225 Difference]: With dead ends: 94 [2020-09-25 10:05:58,770 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 10:05:58,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-09-25 10:05:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 10:05:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-09-25 10:05:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-25 10:05:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-25 10:05:58,789 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 42 [2020-09-25 10:05:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:05:58,790 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-25 10:05:58,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 10:05:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-25 10:05:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 10:05:58,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:05:58,798 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:05:58,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:05:58,798 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:05:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:05:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash -885856494, now seen corresponding path program 1 times [2020-09-25 10:05:58,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:05:58,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101473828] [2020-09-25 10:05:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:05:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:58,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:58,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:59,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:59,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:59,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 10:05:59,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:05:59,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-09-25 10:05:59,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:59,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:05:59,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:05:59,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 10:05:59,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:59,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:05:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:59,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:59,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:05:59,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:59,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:05:59,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:59,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:59,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:59,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:05:59,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:59,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:59,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 10:05:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:59,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:59,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 10:05:59,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:59,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 10:05:59,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:59,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:05:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:05:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:05:59,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-25 10:05:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:05:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:05:59,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:05:59,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 10:05:59,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:05:59,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 10:05:59,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:05:59,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:05:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:05:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:05:59,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:05:59,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:05:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:05:59,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101473828] [2020-09-25 10:05:59,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:05:59,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:05:59,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939083009] [2020-09-25 10:05:59,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:05:59,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:05:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:05:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:05:59,876 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 9 states. [2020-09-25 10:06:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:00,194 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-09-25 10:06:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:06:00,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 10:06:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:00,197 INFO L225 Difference]: With dead ends: 126 [2020-09-25 10:06:00,197 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 10:06:00,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:06:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 10:06:00,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2020-09-25 10:06:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 10:06:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-09-25 10:06:00,212 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 49 [2020-09-25 10:06:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:00,212 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-09-25 10:06:00,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:06:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-09-25 10:06:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 10:06:00,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:00,215 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 10:06:00,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:06:00,215 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:00,217 INFO L82 PathProgramCache]: Analyzing trace with hash 222909824, now seen corresponding path program 2 times [2020-09-25 10:06:00,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:00,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018555530] [2020-09-25 10:06:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:00,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:00,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:04,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:05,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 10:06:05,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:06:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 10:06:05,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:05,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:05,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:06:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:06:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 10:06:05,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:05,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:05,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:05,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:05,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:05,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 10:06:05,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:05,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:06:05,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 10:06:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:05,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:05,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 10:06:05,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:05,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-25 10:06:05,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:05,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:06:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:06:05,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:06:05,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:05,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 10:06:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:05,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:05,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:06:05,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:05,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:06:05,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:05,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:05,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:05,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 10:06:05,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:05,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:06:05,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018555530] [2020-09-25 10:06:05,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:05,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:06:05,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274803350] [2020-09-25 10:06:05,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:06:05,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:06:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:06:05,627 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 11 states. [2020-09-25 10:06:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:06,062 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2020-09-25 10:06:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 10:06:06,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-09-25 10:06:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:06,064 INFO L225 Difference]: With dead ends: 138 [2020-09-25 10:06:06,064 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 10:06:06,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:06:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 10:06:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-09-25 10:06:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-25 10:06:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-09-25 10:06:06,094 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 51 [2020-09-25 10:06:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:06,094 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-09-25 10:06:06,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:06:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-09-25 10:06:06,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 10:06:06,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:06,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:06,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:06:06,097 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:06,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1623372136, now seen corresponding path program 1 times [2020-09-25 10:06:06,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:06,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646571718] [2020-09-25 10:06:06,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:06,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:06,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:06,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:06,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:08,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:09,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:09,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:06:09,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:06:09,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3478 [2020-09-25 10:06:09,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:09,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:09,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:06:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:06:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 10:06:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:09,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:09,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:09,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:09,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:09,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:09,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:06:09,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:09,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:09,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:09,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:09,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 10:06:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:09,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:09,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:09,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 10:06:09,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:09,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-25 10:06:09,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:09,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:09,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:06:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:06:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:06:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:09,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-25 10:06:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:09,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:09,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:09,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 10:06:09,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:09,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:06:09,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:09,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:06:09,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:09,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:06:09,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646571718] [2020-09-25 10:06:09,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:09,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:06:09,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937623782] [2020-09-25 10:06:09,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:06:09,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:06:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:06:09,841 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 11 states. [2020-09-25 10:06:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:10,332 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2020-09-25 10:06:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 10:06:10,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-09-25 10:06:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:10,334 INFO L225 Difference]: With dead ends: 128 [2020-09-25 10:06:10,335 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 10:06:10,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:06:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 10:06:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2020-09-25 10:06:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 10:06:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-09-25 10:06:10,344 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 57 [2020-09-25 10:06:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:10,345 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-09-25 10:06:10,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:06:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-09-25 10:06:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 10:06:10,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:10,346 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 10:06:10,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:06:10,347 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:10,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2114970198, now seen corresponding path program 1 times [2020-09-25 10:06:10,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:10,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766292561] [2020-09-25 10:06:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:10,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:10,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:11,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:11,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:11,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:11,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:12,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:15,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:15,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 10:06:15,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:06:15,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 10:06:15,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:15,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:06:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:06:15,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 10:06:15,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:15,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:15,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:15,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:15,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:06:15,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:15,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:15,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:15,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:15,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-25 10:06:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:15,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:06:15,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:06:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:06:15,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 10:06:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:15,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:06:15,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:06:15,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:15,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 10:06:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:06:15,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766292561] [2020-09-25 10:06:15,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:15,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 10:06:15,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621687842] [2020-09-25 10:06:15,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 10:06:15,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 10:06:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:06:15,650 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 13 states. [2020-09-25 10:06:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:16,296 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2020-09-25 10:06:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 10:06:16,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-25 10:06:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:16,298 INFO L225 Difference]: With dead ends: 124 [2020-09-25 10:06:16,298 INFO L226 Difference]: Without dead ends: 101 [2020-09-25 10:06:16,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-09-25 10:06:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-25 10:06:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-25 10:06:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 10:06:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-09-25 10:06:16,306 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 59 [2020-09-25 10:06:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:16,306 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-09-25 10:06:16,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 10:06:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-09-25 10:06:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 10:06:16,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:16,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:16,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:06:16,308 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1706976893, now seen corresponding path program 3 times [2020-09-25 10:06:16,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:16,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262220700] [2020-09-25 10:06:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:16,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:17,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:20,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:20,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 10:06:20,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:06:20,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4306 [2020-09-25 10:06:20,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:20,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 10:06:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 10:06:20,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 10:06:20,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:20,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:20,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:20,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:20,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:20,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:20,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:06:20,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:20,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:20,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:20,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:20,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-25 10:06:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:20,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:20,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:20,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 10:06:20,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:20,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-25 10:06:20,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:20,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:06:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:06:20,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 10:06:20,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:20,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-25 10:06:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:21,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:21,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:06:21,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:21,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:06:21,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:21,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-25 10:06:21,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:21,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:06:21,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262220700] [2020-09-25 10:06:21,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:21,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 10:06:21,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178698837] [2020-09-25 10:06:21,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 10:06:21,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 10:06:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:06:21,012 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 14 states. [2020-09-25 10:06:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:21,594 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-09-25 10:06:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 10:06:21,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-09-25 10:06:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:21,596 INFO L225 Difference]: With dead ends: 129 [2020-09-25 10:06:21,596 INFO L226 Difference]: Without dead ends: 109 [2020-09-25 10:06:21,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2020-09-25 10:06:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-25 10:06:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-09-25 10:06:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 10:06:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-09-25 10:06:21,604 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 60 [2020-09-25 10:06:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:21,605 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-09-25 10:06:21,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 10:06:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-09-25 10:06:21,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 10:06:21,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:21,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:21,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:06:21,607 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1727079450, now seen corresponding path program 1 times [2020-09-25 10:06:21,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:21,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423586515] [2020-09-25 10:06:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:21,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:21,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:22,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:22,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 10:06:22,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:06:22,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:22,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:22,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:22,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:22,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:22,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:06:22,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:22,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:22,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:22,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:22,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 10:06:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:22,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:22,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:22,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:22,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 10:06:22,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 10:06:22,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:22,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:06:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:22,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:22,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:22,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 10:06:22,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 10:06:22,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:22,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:06:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:06:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:06:22,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-25 10:06:22,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423586515] [2020-09-25 10:06:22,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:06:22,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-25 10:06:22,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594607175] [2020-09-25 10:06:22,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:06:22,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:06:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:06:22,504 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 11 states. [2020-09-25 10:06:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:22,997 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-09-25 10:06:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:06:22,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-25 10:06:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:23,000 INFO L225 Difference]: With dead ends: 104 [2020-09-25 10:06:23,000 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 10:06:23,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-09-25 10:06:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 10:06:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-09-25 10:06:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-25 10:06:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-09-25 10:06:23,009 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 62 [2020-09-25 10:06:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:23,009 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-09-25 10:06:23,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:06:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-09-25 10:06:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 10:06:23,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:23,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:23,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 10:06:23,011 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1187742581, now seen corresponding path program 1 times [2020-09-25 10:06:23,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:23,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999027338] [2020-09-25 10:06:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:23,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:23,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:23,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 10:06:23,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:06:23,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-09-25 10:06:23,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:23,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:23,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 10:06:23,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 10:06:23,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 10:06:23,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:06:24,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:24,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:24,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:24,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:24,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:24,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:06:24,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:24,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:24,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:24,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:24,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:24,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:24,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 10:06:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:24,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:24,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:24,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 10:06:24,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:06:24,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-09-25 10:06:24,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:24,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:24,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:06:24,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:24,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 10:06:24,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:24,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:06:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:24,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:24,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 10:06:24,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:24,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 10:06:24,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:24,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:06:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 10:06:24,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 10:06:24,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 10:06:24,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999027338] [2020-09-25 10:06:24,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:24,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 10:06:24,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886384315] [2020-09-25 10:06:24,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 10:06:24,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 10:06:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:06:24,743 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 15 states. [2020-09-25 10:06:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:25,682 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2020-09-25 10:06:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 10:06:25,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-09-25 10:06:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:25,684 INFO L225 Difference]: With dead ends: 111 [2020-09-25 10:06:25,684 INFO L226 Difference]: Without dead ends: 103 [2020-09-25 10:06:25,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2020-09-25 10:06:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-25 10:06:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2020-09-25 10:06:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 10:06:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-09-25 10:06:25,699 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 69 [2020-09-25 10:06:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:25,699 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-09-25 10:06:25,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 10:06:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-09-25 10:06:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 10:06:25,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:25,704 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 10:06:25,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 10:06:25,706 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash 979580858, now seen corresponding path program 2 times [2020-09-25 10:06:25,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:25,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213414501] [2020-09-25 10:06:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:25,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:25,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:26,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:26,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:27,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:27,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:27,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:29,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:30,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:30,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 10:06:30,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 10:06:30,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 10:06:30,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:30,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:06:30,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 10:06:30,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-25 10:06:30,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:30,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:30,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:30,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:06:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:06:30,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:30,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:30,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:30,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 10:06:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:30,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:31,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:31,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 10:06:31,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:06:31,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-09-25 10:06:31,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:31,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:06:31,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:31,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 10:06:31,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:31,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:06:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:31,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:31,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 10:06:31,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:31,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-25 10:06:31,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:31,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:31,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:06:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 10:06:31,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-25 10:06:31,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213414501] [2020-09-25 10:06:31,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:31,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:06:31,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630591899] [2020-09-25 10:06:31,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:06:31,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:06:31,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:06:31,357 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 12 states. [2020-09-25 10:06:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:31,984 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2020-09-25 10:06:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 10:06:31,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-25 10:06:31,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:31,986 INFO L225 Difference]: With dead ends: 139 [2020-09-25 10:06:31,986 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 10:06:31,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-09-25 10:06:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 10:06:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2020-09-25 10:06:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-25 10:06:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2020-09-25 10:06:31,997 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 76 [2020-09-25 10:06:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:31,998 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2020-09-25 10:06:31,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:06:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2020-09-25 10:06:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 10:06:31,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:32,000 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:32,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 10:06:32,000 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1305863211, now seen corresponding path program 3 times [2020-09-25 10:06:32,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:32,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018058687] [2020-09-25 10:06:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 10:06:32,035 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 10:06:32,036 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 10:06:32,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 10:06:32,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:06:32 BoogieIcfgContainer [2020-09-25 10:06:32,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 10:06:32,063 INFO L168 Benchmark]: Toolchain (without parser) took 45945.86 ms. Allocated memory was 148.4 MB in the beginning and 456.7 MB in the end (delta: 308.3 MB). Free memory was 102.5 MB in the beginning and 386.6 MB in the end (delta: -284.1 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-09-25 10:06:32,064 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 10:06:32,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.48 ms. Allocated memory was 148.4 MB in the beginning and 206.0 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 172.1 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-09-25 10:06:32,065 INFO L168 Benchmark]: Boogie Preprocessor took 69.09 ms. Allocated memory is still 206.0 MB. Free memory was 172.1 MB in the beginning and 169.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-25 10:06:32,066 INFO L168 Benchmark]: RCFGBuilder took 704.51 ms. Allocated memory is still 206.0 MB. Free memory was 169.6 MB in the beginning and 123.5 MB in the end (delta: 46.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. [2020-09-25 10:06:32,067 INFO L168 Benchmark]: TraceAbstraction took 44537.26 ms. Allocated memory was 206.0 MB in the beginning and 456.7 MB in the end (delta: 250.6 MB). Free memory was 122.9 MB in the beginning and 386.6 MB in the end (delta: -263.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 10:06:32,070 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 623.48 ms. Allocated memory was 148.4 MB in the beginning and 206.0 MB in the end (delta: 57.7 MB). Free memory was 101.9 MB in the beginning and 172.1 MB in the end (delta: -70.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.09 ms. Allocated memory is still 206.0 MB. Free memory was 172.1 MB in the beginning and 169.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 704.51 ms. Allocated memory is still 206.0 MB. Free memory was 169.6 MB in the beginning and 123.5 MB in the end (delta: 46.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 44537.26 ms. Allocated memory was 206.0 MB in the beginning and 456.7 MB in the end (delta: 250.6 MB). Free memory was 122.9 MB in the beginning and 386.6 MB in the end (delta: -263.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 44.4s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 645 SDtfs, 1338 SDslu, 1993 SDs, 0 SdLazy, 3907 SolverSat, 176 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 268 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 189 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 37.4s InterpolantComputationTime, 678 NumberOfCodeBlocks, 678 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 584 ConstructedInterpolants, 0 QuantifiedInterpolants, 119744 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 95/166 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...