/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:38:21,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:38:21,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:38:21,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:38:21,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:38:21,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:38:21,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:38:21,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:38:21,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:38:21,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:38:21,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:38:21,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:38:21,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:38:21,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:38:21,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:38:21,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:38:21,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:38:21,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:38:21,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:38:21,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:38:21,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:38:21,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:38:21,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:38:21,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:38:21,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:38:21,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:38:21,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:38:21,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:38:21,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:38:21,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:38:21,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:38:21,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:38:21,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:38:21,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:38:21,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:38:21,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:38:21,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:38:21,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:38:21,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:38:21,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:38:21,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:38:21,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:38:21,452 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:38:21,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:38:21,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:38:21,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:38:21,454 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:38:21,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:38:21,454 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:38:21,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:38:21,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:38:21,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:38:21,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:38:21,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:38:21,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:38:21,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:38:21,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:38:21,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:38:21,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:38:21,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:38:21,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:38:21,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:38:21,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:38:21,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:38:21,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:38:21,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:38:21,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:38:21,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:38:21,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:38:21,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:38:21,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:38:21,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:38:21,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:38:21,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:38:21,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:38:21,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:38:21,952 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:38:21,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-24 21:38:22,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d1033bc9/cade219d40c441c2b450c09f33912aed/FLAGe3420833c [2020-09-24 21:38:22,631 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:38:22,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-24 21:38:22,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d1033bc9/cade219d40c441c2b450c09f33912aed/FLAGe3420833c [2020-09-24 21:38:22,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d1033bc9/cade219d40c441c2b450c09f33912aed [2020-09-24 21:38:22,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:38:22,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:38:22,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:22,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:38:22,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:38:22,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:22" (1/1) ... [2020-09-24 21:38:22,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb53380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:22, skipping insertion in model container [2020-09-24 21:38:22,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:38:22" (1/1) ... [2020-09-24 21:38:22,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:38:23,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:38:23,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:23,494 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:38:23,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:38:23,641 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:38:23,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23 WrapperNode [2020-09-24 21:38:23,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:38:23,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:38:23,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:38:23,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:38:23,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... [2020-09-24 21:38:23,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:38:23,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:38:23,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:38:23,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:38:23,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:38:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:38:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:38:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 21:38:23,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 21:38:23,813 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 21:38:23,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:38:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:38:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:38:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 21:38:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 21:38:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 21:38:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 21:38:23,815 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 21:38:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 21:38:23,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 21:38:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 21:38:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 21:38:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 21:38:23,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 21:38:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 21:38:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 21:38:23,818 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 21:38:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 21:38:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 21:38:23,819 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 21:38:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 21:38:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 21:38:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 21:38:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 21:38:23,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 21:38:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 21:38:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 21:38:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 21:38:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 21:38:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 21:38:23,821 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 21:38:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 21:38:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 21:38:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 21:38:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 21:38:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 21:38:23,825 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 21:38:23,825 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 21:38:23,825 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 21:38:23,825 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 21:38:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 21:38:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 21:38:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 21:38:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 21:38:23,826 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 21:38:23,827 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 21:38:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 21:38:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-24 21:38:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 21:38:23,828 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 21:38:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 21:38:23,829 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 21:38:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:38:23,830 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 21:38:23,831 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 21:38:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 21:38:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:38:23,832 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 21:38:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 21:38:23,833 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 21:38:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 21:38:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 21:38:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 21:38:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 21:38:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 21:38:23,834 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 21:38:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 21:38:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 21:38:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 21:38:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 21:38:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 21:38:23,835 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 21:38:23,836 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 21:38:23,837 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 21:38:23,838 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 21:38:23,838 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 21:38:23,838 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 21:38:23,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 21:38:23,838 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 21:38:23,838 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:38:23,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:38:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:38:23,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:38:24,166 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 21:38:24,528 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:38:24,528 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-24 21:38:24,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:24 BoogieIcfgContainer [2020-09-24 21:38:24,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:38:24,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:38:24,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:38:24,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:38:24,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:38:22" (1/3) ... [2020-09-24 21:38:24,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffed78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:24, skipping insertion in model container [2020-09-24 21:38:24,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:38:23" (2/3) ... [2020-09-24 21:38:24,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffed78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:38:24, skipping insertion in model container [2020-09-24 21:38:24,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:38:24" (3/3) ... [2020-09-24 21:38:24,545 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-24 21:38:24,557 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:38:24,569 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:38:24,592 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:38:24,627 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:38:24,627 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:38:24,627 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:38:24,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:38:24,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:38:24,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:38:24,628 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:38:24,628 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:38:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states. [2020-09-24 21:38:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:38:24,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:24,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:24,671 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:24,680 INFO L82 PathProgramCache]: Analyzing trace with hash -652445128, now seen corresponding path program 1 times [2020-09-24 21:38:24,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:24,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89030921] [2020-09-24 21:38:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:24,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:24,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:25,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:38:25,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:38:25,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-09-24 21:38:25,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:38:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:38:25,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:38:25,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:38:25,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:25,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:25,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:25,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:25,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:25,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:38:25,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:25,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:25,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89030921] [2020-09-24 21:38:25,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:25,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:38:25,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836016433] [2020-09-24 21:38:25,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:38:25,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:38:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:38:25,931 INFO L87 Difference]: Start difference. First operand 177 states. Second operand 5 states. [2020-09-24 21:38:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:26,400 INFO L93 Difference]: Finished difference Result 377 states and 443 transitions. [2020-09-24 21:38:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:38:26,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 21:38:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:26,419 INFO L225 Difference]: With dead ends: 377 [2020-09-24 21:38:26,419 INFO L226 Difference]: Without dead ends: 201 [2020-09-24 21:38:26,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:38:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-24 21:38:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-09-24 21:38:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 21:38:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2020-09-24 21:38:26,500 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 31 [2020-09-24 21:38:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:26,501 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2020-09-24 21:38:26,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:38:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2020-09-24 21:38:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 21:38:26,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:26,510 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, 1, 1, 1, 1, 1] [2020-09-24 21:38:26,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:38:26,511 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1870874818, now seen corresponding path program 1 times [2020-09-24 21:38:26,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:26,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618887642] [2020-09-24 21:38:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:26,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:26,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:26,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:27,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:27,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 21:38:27,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:38:27,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 919 [2020-09-24 21:38:27,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:38:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:38:27,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:38:27,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:27,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:27,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:27,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:27,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:27,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:38:27,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:27,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:27,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618887642] [2020-09-24 21:38:27,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:27,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:38:27,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159644611] [2020-09-24 21:38:27,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:38:27,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:27,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:38:27,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:38:27,616 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 7 states. [2020-09-24 21:38:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:28,369 INFO L93 Difference]: Finished difference Result 530 states and 596 transitions. [2020-09-24 21:38:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:38:28,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-09-24 21:38:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:28,378 INFO L225 Difference]: With dead ends: 530 [2020-09-24 21:38:28,380 INFO L226 Difference]: Without dead ends: 411 [2020-09-24 21:38:28,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:38:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-09-24 21:38:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 284. [2020-09-24 21:38:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-09-24 21:38:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 319 transitions. [2020-09-24 21:38:28,439 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 319 transitions. Word has length 54 [2020-09-24 21:38:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:28,440 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 319 transitions. [2020-09-24 21:38:28,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:38:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 319 transitions. [2020-09-24 21:38:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 21:38:28,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:28,446 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:28,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:38:28,449 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 129316031, now seen corresponding path program 1 times [2020-09-24 21:38:28,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:28,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845530970] [2020-09-24 21:38:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:28,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:28,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:28,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 21:38:28,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-24 21:38:28,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:28,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:38:28,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 21:38:28,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:38:28,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:28,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:28,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:28,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:28,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:28,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:38:28,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:28,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:28,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:28,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:28,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:28,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845530970] [2020-09-24 21:38:28,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:28,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:38:28,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256079765] [2020-09-24 21:38:28,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:38:28,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:38:28,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:38:28,836 INFO L87 Difference]: Start difference. First operand 284 states and 319 transitions. Second operand 7 states. [2020-09-24 21:38:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:29,338 INFO L93 Difference]: Finished difference Result 361 states and 401 transitions. [2020-09-24 21:38:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:38:29,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-09-24 21:38:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:29,341 INFO L225 Difference]: With dead ends: 361 [2020-09-24 21:38:29,341 INFO L226 Difference]: Without dead ends: 355 [2020-09-24 21:38:29,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:38:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-09-24 21:38:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 297. [2020-09-24 21:38:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-24 21:38:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 335 transitions. [2020-09-24 21:38:29,359 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 335 transitions. Word has length 56 [2020-09-24 21:38:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:29,359 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 335 transitions. [2020-09-24 21:38:29,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:38:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 335 transitions. [2020-09-24 21:38:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 21:38:29,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:29,363 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:29,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:38:29,363 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash 593034583, now seen corresponding path program 1 times [2020-09-24 21:38:29,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:29,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393856061] [2020-09-24 21:38:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:29,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:29,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:29,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:38:29,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:29,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-09-24 21:38:29,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:29,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:38:29,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 21:38:29,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:38:29,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:29,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:29,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:29,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:29,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:29,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:38:29,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:29,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:29,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:29,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:29,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:29,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393856061] [2020-09-24 21:38:29,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:29,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:38:29,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812869274] [2020-09-24 21:38:29,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:38:29,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:29,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:38:29,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:38:29,674 INFO L87 Difference]: Start difference. First operand 297 states and 335 transitions. Second operand 7 states. [2020-09-24 21:38:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:30,093 INFO L93 Difference]: Finished difference Result 364 states and 404 transitions. [2020-09-24 21:38:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:38:30,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-24 21:38:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:30,096 INFO L225 Difference]: With dead ends: 364 [2020-09-24 21:38:30,096 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 21:38:30,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:38:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 21:38:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 294. [2020-09-24 21:38:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-24 21:38:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 331 transitions. [2020-09-24 21:38:30,110 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 331 transitions. Word has length 62 [2020-09-24 21:38:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:30,111 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 331 transitions. [2020-09-24 21:38:30,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:38:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 331 transitions. [2020-09-24 21:38:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 21:38:30,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:30,114 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:30,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:38:30,114 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:30,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1629716359, now seen corresponding path program 1 times [2020-09-24 21:38:30,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:30,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878328873] [2020-09-24 21:38:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:30,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:30,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:30,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 21:38:30,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:30,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-09-24 21:38:30,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:38:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-24 21:38:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:38:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:30,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:30,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:30,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:30,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:30,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:30,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:30,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:30,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:30,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878328873] [2020-09-24 21:38:30,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:30,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 21:38:30,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045991236] [2020-09-24 21:38:30,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:38:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:30,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:38:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:38:30,444 INFO L87 Difference]: Start difference. First operand 294 states and 331 transitions. Second operand 7 states. [2020-09-24 21:38:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:30,849 INFO L93 Difference]: Finished difference Result 346 states and 385 transitions. [2020-09-24 21:38:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:38:30,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-09-24 21:38:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:30,852 INFO L225 Difference]: With dead ends: 346 [2020-09-24 21:38:30,852 INFO L226 Difference]: Without dead ends: 322 [2020-09-24 21:38:30,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:38:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-24 21:38:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 289. [2020-09-24 21:38:30,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-09-24 21:38:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 325 transitions. [2020-09-24 21:38:30,864 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 325 transitions. Word has length 62 [2020-09-24 21:38:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:30,864 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 325 transitions. [2020-09-24 21:38:30,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:38:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 325 transitions. [2020-09-24 21:38:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 21:38:30,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:30,866 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:30,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:38:30,867 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:30,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash 852438762, now seen corresponding path program 1 times [2020-09-24 21:38:30,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:30,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78118177] [2020-09-24 21:38:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:30,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:31,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:32,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:32,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 21:38:32,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1468 [2020-09-24 21:38:32,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:32,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:38:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:38:32,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:32,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:32,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:32,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:32,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:32,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:38:32,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:32,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:32,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78118177] [2020-09-24 21:38:32,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:32,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:38:32,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476972015] [2020-09-24 21:38:32,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:38:32,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:32,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:38:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:38:32,745 INFO L87 Difference]: Start difference. First operand 289 states and 325 transitions. Second operand 15 states. [2020-09-24 21:38:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:34,094 INFO L93 Difference]: Finished difference Result 384 states and 425 transitions. [2020-09-24 21:38:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:38:34,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 21:38:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:34,097 INFO L225 Difference]: With dead ends: 384 [2020-09-24 21:38:34,097 INFO L226 Difference]: Without dead ends: 371 [2020-09-24 21:38:34,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-09-24 21:38:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 305. [2020-09-24 21:38:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-09-24 21:38:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 342 transitions. [2020-09-24 21:38:34,111 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 342 transitions. Word has length 67 [2020-09-24 21:38:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:34,111 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 342 transitions. [2020-09-24 21:38:34,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:38:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 342 transitions. [2020-09-24 21:38:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 21:38:34,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:34,114 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:34,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:38:34,115 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1742912072, now seen corresponding path program 1 times [2020-09-24 21:38:34,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:34,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803151525] [2020-09-24 21:38:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:34,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:35,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:35,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 21:38:35,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 21:38:35,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:38:35,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 21:38:35,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:35,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:35,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:35,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:35,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:35,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:35,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:35,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803151525] [2020-09-24 21:38:35,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:35,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:38:35,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830724286] [2020-09-24 21:38:35,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:38:35,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:38:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:38:35,505 INFO L87 Difference]: Start difference. First operand 305 states and 342 transitions. Second operand 15 states. [2020-09-24 21:38:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:36,818 INFO L93 Difference]: Finished difference Result 408 states and 452 transitions. [2020-09-24 21:38:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:38:36,819 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-24 21:38:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:36,823 INFO L225 Difference]: With dead ends: 408 [2020-09-24 21:38:36,823 INFO L226 Difference]: Without dead ends: 402 [2020-09-24 21:38:36,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-09-24 21:38:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 327. [2020-09-24 21:38:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-09-24 21:38:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 367 transitions. [2020-09-24 21:38:36,835 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 367 transitions. Word has length 67 [2020-09-24 21:38:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:36,835 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 367 transitions. [2020-09-24 21:38:36,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:38:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 367 transitions. [2020-09-24 21:38:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 21:38:36,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:36,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:36,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:38:36,837 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash -838472334, now seen corresponding path program 1 times [2020-09-24 21:38:36,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:36,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811881244] [2020-09-24 21:38:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:36,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:37,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:37,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:38:37,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:37,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-09-24 21:38:37,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:38:37,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:37,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:38:37,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:37,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:37,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:37,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:37,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:37,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:37,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:37,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:37,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:37,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:37,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811881244] [2020-09-24 21:38:37,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:37,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:38:37,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184583652] [2020-09-24 21:38:37,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:38:37,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:37,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:38:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:38:37,914 INFO L87 Difference]: Start difference. First operand 327 states and 367 transitions. Second operand 16 states. [2020-09-24 21:38:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:39,170 INFO L93 Difference]: Finished difference Result 392 states and 435 transitions. [2020-09-24 21:38:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:38:39,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-09-24 21:38:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:39,173 INFO L225 Difference]: With dead ends: 392 [2020-09-24 21:38:39,173 INFO L226 Difference]: Without dead ends: 386 [2020-09-24 21:38:39,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-09-24 21:38:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 331. [2020-09-24 21:38:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-09-24 21:38:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 371 transitions. [2020-09-24 21:38:39,187 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 371 transitions. Word has length 73 [2020-09-24 21:38:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:39,187 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 371 transitions. [2020-09-24 21:38:39,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:38:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 371 transitions. [2020-09-24 21:38:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 21:38:39,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:39,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:39,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:38:39,189 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:39,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1654345840, now seen corresponding path program 1 times [2020-09-24 21:38:39,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:39,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774847356] [2020-09-24 21:38:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:39,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:39,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:39,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:38:39,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:39,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-09-24 21:38:39,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:38:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:38:39,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:40,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:40,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:40,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:40,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:40,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:40,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:40,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:40,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:40,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774847356] [2020-09-24 21:38:40,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:40,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:38:40,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671430047] [2020-09-24 21:38:40,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:38:40,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:40,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:38:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:38:40,303 INFO L87 Difference]: Start difference. First operand 331 states and 371 transitions. Second operand 16 states. [2020-09-24 21:38:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:41,827 INFO L93 Difference]: Finished difference Result 406 states and 449 transitions. [2020-09-24 21:38:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:38:41,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-09-24 21:38:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:41,829 INFO L225 Difference]: With dead ends: 406 [2020-09-24 21:38:41,830 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 21:38:41,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 21:38:41,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 340. [2020-09-24 21:38:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-09-24 21:38:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 381 transitions. [2020-09-24 21:38:41,842 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 381 transitions. Word has length 73 [2020-09-24 21:38:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:41,842 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 381 transitions. [2020-09-24 21:38:41,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:38:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 381 transitions. [2020-09-24 21:38:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-24 21:38:41,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:41,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:41,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:38:41,844 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:41,845 INFO L82 PathProgramCache]: Analyzing trace with hash -617664064, now seen corresponding path program 1 times [2020-09-24 21:38:41,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:41,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661235838] [2020-09-24 21:38:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:42,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:43,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:43,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:38:43,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:43,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-09-24 21:38:43,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:43,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:38:43,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:43,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:38:43,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:43,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:43,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:43,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:43,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:43,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:43,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:43,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:43,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:43,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661235838] [2020-09-24 21:38:43,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:43,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:38:43,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793121929] [2020-09-24 21:38:43,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:38:43,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:43,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:38:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:38:43,766 INFO L87 Difference]: Start difference. First operand 340 states and 381 transitions. Second operand 16 states. [2020-09-24 21:38:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:45,378 INFO L93 Difference]: Finished difference Result 411 states and 455 transitions. [2020-09-24 21:38:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:38:45,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-09-24 21:38:45,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:45,382 INFO L225 Difference]: With dead ends: 411 [2020-09-24 21:38:45,382 INFO L226 Difference]: Without dead ends: 405 [2020-09-24 21:38:45,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-09-24 21:38:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 340. [2020-09-24 21:38:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-09-24 21:38:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 381 transitions. [2020-09-24 21:38:45,395 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 381 transitions. Word has length 73 [2020-09-24 21:38:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:45,396 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 381 transitions. [2020-09-24 21:38:45,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:38:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 381 transitions. [2020-09-24 21:38:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 21:38:45,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:45,397 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:45,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:38:45,397 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash 342604767, now seen corresponding path program 2 times [2020-09-24 21:38:45,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:45,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546429383] [2020-09-24 21:38:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:45,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:48,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:48,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:38:48,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:48,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2642 [2020-09-24 21:38:48,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:48,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:38:48,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:48,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:38:48,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:48,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:48,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:48,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:48,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:48,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:48,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:48,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:48,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:48,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:48,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:48,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:48,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546429383] [2020-09-24 21:38:48,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:48,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:38:48,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665881484] [2020-09-24 21:38:48,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:38:48,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:38:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:38:48,504 INFO L87 Difference]: Start difference. First operand 340 states and 381 transitions. Second operand 20 states. [2020-09-24 21:38:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:49,819 INFO L93 Difference]: Finished difference Result 417 states and 463 transitions. [2020-09-24 21:38:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:38:49,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-09-24 21:38:49,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:49,823 INFO L225 Difference]: With dead ends: 417 [2020-09-24 21:38:49,823 INFO L226 Difference]: Without dead ends: 404 [2020-09-24 21:38:49,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:38:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-09-24 21:38:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 356. [2020-09-24 21:38:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-09-24 21:38:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 398 transitions. [2020-09-24 21:38:49,836 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 398 transitions. Word has length 78 [2020-09-24 21:38:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:49,836 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 398 transitions. [2020-09-24 21:38:49,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:38:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 398 transitions. [2020-09-24 21:38:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 21:38:49,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:49,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:49,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:38:49,839 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:49,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1736898641, now seen corresponding path program 1 times [2020-09-24 21:38:49,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:49,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307773594] [2020-09-24 21:38:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:49,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:53,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:53,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:38:53,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:53,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3335 [2020-09-24 21:38:53,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:38:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:53,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:38:53,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:53,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:53,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:53,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:53,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:53,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:53,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:38:53,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:53,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:53,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:53,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:53,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307773594] [2020-09-24 21:38:53,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:53,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:38:53,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805421195] [2020-09-24 21:38:53,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:38:53,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:38:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:38:53,764 INFO L87 Difference]: Start difference. First operand 356 states and 398 transitions. Second operand 20 states. [2020-09-24 21:38:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:55,773 INFO L93 Difference]: Finished difference Result 459 states and 508 transitions. [2020-09-24 21:38:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:38:55,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-09-24 21:38:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:55,777 INFO L225 Difference]: With dead ends: 459 [2020-09-24 21:38:55,777 INFO L226 Difference]: Without dead ends: 453 [2020-09-24 21:38:55,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 21:38:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-09-24 21:38:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 370. [2020-09-24 21:38:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-09-24 21:38:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 413 transitions. [2020-09-24 21:38:55,793 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 413 transitions. Word has length 78 [2020-09-24 21:38:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:55,793 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 413 transitions. [2020-09-24 21:38:55,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:38:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 413 transitions. [2020-09-24 21:38:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 21:38:55,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:55,795 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:55,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:38:55,795 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash -858452193, now seen corresponding path program 2 times [2020-09-24 21:38:55,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:55,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079986953] [2020-09-24 21:38:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:56,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:58,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:58,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:38:58,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:58,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-09-24 21:38:58,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:38:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:38:58,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:38:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:58,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:58,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:58,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:58,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:58,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:58,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:58,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:58,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:38:58,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079986953] [2020-09-24 21:38:58,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:58,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:38:58,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601333436] [2020-09-24 21:38:58,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:38:58,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:38:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:38:58,430 INFO L87 Difference]: Start difference. First operand 370 states and 413 transitions. Second operand 20 states. [2020-09-24 21:38:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:59,720 INFO L93 Difference]: Finished difference Result 472 states and 523 transitions. [2020-09-24 21:38:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:38:59,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2020-09-24 21:38:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:59,722 INFO L225 Difference]: With dead ends: 472 [2020-09-24 21:38:59,722 INFO L226 Difference]: Without dead ends: 466 [2020-09-24 21:38:59,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:38:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-09-24 21:38:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 372. [2020-09-24 21:38:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-09-24 21:38:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 416 transitions. [2020-09-24 21:38:59,737 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 416 transitions. Word has length 78 [2020-09-24 21:38:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:59,737 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 416 transitions. [2020-09-24 21:38:59,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:38:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 416 transitions. [2020-09-24 21:38:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:38:59,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:59,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:59,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:38:59,739 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1698374602, now seen corresponding path program 1 times [2020-09-24 21:38:59,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:59,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091713846] [2020-09-24 21:38:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:00,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:00,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 21:39:00,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:00,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-09-24 21:39:00,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:00,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:00,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:39:00,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:39:00,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:00,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:00,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:00,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:39:00,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:00,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:39:00,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:39:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:39:00,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:00,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091713846] [2020-09-24 21:39:00,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:00,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:39:00,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512046800] [2020-09-24 21:39:00,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:39:00,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:00,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:39:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:39:00,729 INFO L87 Difference]: Start difference. First operand 372 states and 416 transitions. Second operand 16 states. [2020-09-24 21:39:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:02,215 INFO L93 Difference]: Finished difference Result 445 states and 493 transitions. [2020-09-24 21:39:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:39:02,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 21:39:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:02,218 INFO L225 Difference]: With dead ends: 445 [2020-09-24 21:39:02,218 INFO L226 Difference]: Without dead ends: 430 [2020-09-24 21:39:02,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:39:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-09-24 21:39:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 376. [2020-09-24 21:39:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-09-24 21:39:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 420 transitions. [2020-09-24 21:39:02,236 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 420 transitions. Word has length 79 [2020-09-24 21:39:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:02,237 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 420 transitions. [2020-09-24 21:39:02,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:39:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 420 transitions. [2020-09-24 21:39:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:39:02,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:02,243 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:02,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 21:39:02,244 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1559910918, now seen corresponding path program 2 times [2020-09-24 21:39:02,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:02,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535157671] [2020-09-24 21:39:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:02,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:02,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:02,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 21:39:02,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-09-24 21:39:02,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:39:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:39:02,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:03,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:03,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:03,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:39:03,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:03,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:39:03,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:39:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:03,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:39:03,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:03,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535157671] [2020-09-24 21:39:03,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:03,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:39:03,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033309559] [2020-09-24 21:39:03,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:39:03,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:03,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:39:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:39:03,259 INFO L87 Difference]: Start difference. First operand 376 states and 420 transitions. Second operand 16 states. [2020-09-24 21:39:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:04,486 INFO L93 Difference]: Finished difference Result 425 states and 472 transitions. [2020-09-24 21:39:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:39:04,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 21:39:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:04,489 INFO L225 Difference]: With dead ends: 425 [2020-09-24 21:39:04,489 INFO L226 Difference]: Without dead ends: 395 [2020-09-24 21:39:04,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:39:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-09-24 21:39:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 367. [2020-09-24 21:39:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-09-24 21:39:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 410 transitions. [2020-09-24 21:39:04,501 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 410 transitions. Word has length 79 [2020-09-24 21:39:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:04,502 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 410 transitions. [2020-09-24 21:39:04,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:39:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 410 transitions. [2020-09-24 21:39:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:39:04,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:04,503 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:04,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 21:39:04,504 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:04,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1643861864, now seen corresponding path program 2 times [2020-09-24 21:39:04,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:04,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538048629] [2020-09-24 21:39:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:05,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:05,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 21:39:05,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-09-24 21:39:05,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:39:05,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:39:05,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:05,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:05,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:05,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:05,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:39:05,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:05,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:39:05,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:05,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:39:05,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:05,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:39:05,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:05,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538048629] [2020-09-24 21:39:05,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:05,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:39:05,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666497466] [2020-09-24 21:39:05,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:39:05,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:39:05,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:39:05,407 INFO L87 Difference]: Start difference. First operand 367 states and 410 transitions. Second operand 16 states. [2020-09-24 21:39:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:06,876 INFO L93 Difference]: Finished difference Result 438 states and 484 transitions. [2020-09-24 21:39:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:39:06,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 21:39:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:06,879 INFO L225 Difference]: With dead ends: 438 [2020-09-24 21:39:06,879 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 21:39:06,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:39:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 21:39:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 360. [2020-09-24 21:39:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-24 21:39:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 402 transitions. [2020-09-24 21:39:06,892 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 402 transitions. Word has length 79 [2020-09-24 21:39:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:06,892 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 402 transitions. [2020-09-24 21:39:06,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:39:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 402 transitions. [2020-09-24 21:39:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:39:06,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:06,894 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:06,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 21:39:06,894 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:06,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1971811736, now seen corresponding path program 1 times [2020-09-24 21:39:06,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:06,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503618377] [2020-09-24 21:39:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:07,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:08,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:08,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-24 21:39:08,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:08,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1867 [2020-09-24 21:39:08,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 21:39:08,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 21:39:08,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:09,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:09,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:09,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:09,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:39:09,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:09,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:39:09,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:09,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:39:09,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:09,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:39:09,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:39:09,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503618377] [2020-09-24 21:39:09,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:09,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:39:09,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654876064] [2020-09-24 21:39:09,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:39:09,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:09,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:39:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:39:09,059 INFO L87 Difference]: Start difference. First operand 360 states and 402 transitions. Second operand 16 states. [2020-09-24 21:39:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:10,538 INFO L93 Difference]: Finished difference Result 432 states and 477 transitions. [2020-09-24 21:39:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 21:39:10,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-09-24 21:39:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:10,541 INFO L225 Difference]: With dead ends: 432 [2020-09-24 21:39:10,541 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 21:39:10,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:39:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 21:39:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 360. [2020-09-24 21:39:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-24 21:39:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 402 transitions. [2020-09-24 21:39:10,554 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 402 transitions. Word has length 79 [2020-09-24 21:39:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:10,555 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 402 transitions. [2020-09-24 21:39:10,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:39:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 402 transitions. [2020-09-24 21:39:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:39:10,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:10,556 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:10,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 21:39:10,557 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1286473784, now seen corresponding path program 2 times [2020-09-24 21:39:10,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:10,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257246446] [2020-09-24 21:39:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:10,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking...