/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:01:37,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:01:37,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:01:37,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:01:37,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:01:37,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:01:37,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:01:37,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:01:37,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:01:37,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:01:37,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:01:37,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:01:37,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:01:37,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:01:37,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:01:37,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:01:37,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:01:37,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:01:37,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:01:37,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:01:37,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:01:37,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:01:37,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:01:37,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:01:37,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:01:37,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:01:37,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:01:37,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:01:37,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:01:37,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:01:37,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:01:37,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:01:37,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:01:37,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:01:37,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:01:37,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:01:37,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:01:37,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:01:37,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:01:37,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:01:37,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:01:37,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:01:37,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:01:37,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:01:37,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:01:37,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:01:37,537 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:01:37,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:01:37,537 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:01:37,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:01:37,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:01:37,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:01:37,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:01:37,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:01:37,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:01:37,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:01:37,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:01:37,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:01:37,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:01:37,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:01:37,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:01:37,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:01:37,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:01:37,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:01:37,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:01:37,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:01:37,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:01:37,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:01:37,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:01:37,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:01:37,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:01:37,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:01:37,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:01:37,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:01:37,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:01:37,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:01:37,892 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:01:37,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-14 05:01:37,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09cddf24b/de67fc6d5a0d48cfa4a9a55b5218c805/FLAG470a35fdf [2020-10-14 05:01:38,548 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:01:38,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-14 05:01:38,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09cddf24b/de67fc6d5a0d48cfa4a9a55b5218c805/FLAG470a35fdf [2020-10-14 05:01:38,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09cddf24b/de67fc6d5a0d48cfa4a9a55b5218c805 [2020-10-14 05:01:38,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:01:38,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:01:38,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:01:38,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:01:38,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:01:38,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:01:38" (1/1) ... [2020-10-14 05:01:38,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2799fcfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:38, skipping insertion in model container [2020-10-14 05:01:38,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:01:38" (1/1) ... [2020-10-14 05:01:38,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:01:38,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:01:39,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:01:39,239 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:01:39,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:01:39,343 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:01:39,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39 WrapperNode [2020-10-14 05:01:39,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:01:39,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:01:39,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:01:39,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:01:39,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:01:39,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:01:39,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:01:39,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:01:39,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:01:39,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:01:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:01:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:01:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:01:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:01:39,490 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-14 05:01:39,491 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-14 05:01:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-14 05:01:39,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:01:39,492 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:01:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:01:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:01:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:01:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:01:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:01:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:01:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:01:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:01:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:01:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:01:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:01:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:01:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:01:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:01:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:01:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:01:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:01:39,497 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:01:39,498 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:01:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:01:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:01:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:01:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:01:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:01:39,499 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:01:39,500 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:01:39,500 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:01:39,500 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:01:39,500 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:01:39,501 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:01:39,502 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:01:39,502 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:01:39,502 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:01:39,502 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:01:39,502 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:01:39,503 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:01:39,503 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:01:39,504 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 05:01:39,504 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:01:39,504 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:01:39,505 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:01:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:01:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:01:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:01:39,506 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:01:39,507 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:01:39,508 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:01:39,509 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:01:39,510 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:01:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:01:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:01:39,511 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:01:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:01:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:01:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:01:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:01:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:01:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:01:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:01:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:01:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:01:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-14 05:01:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:01:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:01:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-14 05:01:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:01:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-14 05:01:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:01:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:01:39,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:01:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:01:39,854 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:01:39,989 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:01:39,990 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:01:39,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:01:39 BoogieIcfgContainer [2020-10-14 05:01:39,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:01:39,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:01:39,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:01:40,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:01:40,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:01:38" (1/3) ... [2020-10-14 05:01:40,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62019980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:01:40, skipping insertion in model container [2020-10-14 05:01:40,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (2/3) ... [2020-10-14 05:01:40,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62019980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:01:40, skipping insertion in model container [2020-10-14 05:01:40,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:01:39" (3/3) ... [2020-10-14 05:01:40,006 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2020-10-14 05:01:40,016 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:01:40,024 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:01:40,038 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:01:40,060 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:01:40,060 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:01:40,060 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:01:40,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:01:40,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:01:40,062 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:01:40,062 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:01:40,062 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:01:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-14 05:01:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:01:40,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:40,089 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] [2020-10-14 05:01:40,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-10-14 05:01:40,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:40,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195075877] [2020-10-14 05:01:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:01:40,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:01:40,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-14 05:01:40,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:01:40,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:01:40,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:40,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 05:01:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:40,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:01:40,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:01:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:40,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:40,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 05:01:40,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 05:01:40,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:40,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-14 05:01:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:40,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:40,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-14 05:01:40,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 05:01:40,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:40,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195075877] [2020-10-14 05:01:40,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:01:40,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:01:40,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357476337] [2020-10-14 05:01:40,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:01:40,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:40,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:01:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:01:40,654 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-10-14 05:01:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:40,875 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-10-14 05:01:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:01:40,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 05:01:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:40,888 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:01:40,888 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:01:40,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:01:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:01:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-14 05:01:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:01:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 05:01:40,942 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-14 05:01:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:40,943 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 05:01:40,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:01:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 05:01:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:01:40,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:40,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:40,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:01:40,945 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-10-14 05:01:40,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:40,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908681283] [2020-10-14 05:01:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:41,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:01:41,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:41,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-14 05:01:41,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:41,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:41,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:01:41,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:41,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:01:41,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:41,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:41,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:41,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:41,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:41,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:41,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:41,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:41,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:41,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:41,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-14 05:01:41,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:41,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:41,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:01:41,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:41,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:01:41,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 05:01:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:41,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:41,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:41,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:41,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:41,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 05:01:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:41,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908681283] [2020-10-14 05:01:41,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:01:41,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:01:41,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706944407] [2020-10-14 05:01:41,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:01:41,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:41,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:01:41,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:01:41,288 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-14 05:01:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:41,470 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-14 05:01:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:01:41,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:01:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:41,472 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:01:41,472 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:01:41,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:01:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:01:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 05:01:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:01:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 05:01:41,481 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-10-14 05:01:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:41,481 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 05:01:41,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:01:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 05:01:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:01:41,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:41,483 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] [2020-10-14 05:01:41,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:01:41,483 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-10-14 05:01:41,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:41,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077656118] [2020-10-14 05:01:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:01:42,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:01:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-10-14 05:01:42,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:42,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:42,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:01:42,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:42,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:42,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:01:42,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:01:42,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:01:42,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 05:01:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:42,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:42,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:42,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 05:01:42,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:42,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:42,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077656118] [2020-10-14 05:01:42,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:42,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:01:42,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361765335] [2020-10-14 05:01:42,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:01:42,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:01:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:01:42,587 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-14 05:01:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:42,780 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-14 05:01:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:01:42,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 05:01:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:42,781 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:01:42,782 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:01:42,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:01:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:01:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-14 05:01:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:01:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-14 05:01:42,789 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-10-14 05:01:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:42,790 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-14 05:01:42,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:01:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-14 05:01:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:01:42,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:42,791 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] [2020-10-14 05:01:42,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:01:42,792 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-10-14 05:01:42,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:42,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278834855] [2020-10-14 05:01:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:01:42,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:42,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-14 05:01:42,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:01:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:01:42,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:01:42,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:43,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:43,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:43,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:43,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 05:01:43,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:43,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:43,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 05:01:43,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:01:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:01:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:01:43,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278834855] [2020-10-14 05:01:43,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:01:43,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-14 05:01:43,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702971360] [2020-10-14 05:01:43,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:01:43,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:43,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:01:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:01:43,161 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2020-10-14 05:01:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:43,425 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-14 05:01:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:01:43,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-14 05:01:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:43,427 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:01:43,427 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:01:43,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:01:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:01:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:01:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:01:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-14 05:01:43,440 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 31 [2020-10-14 05:01:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:43,441 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-14 05:01:43,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:01:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-14 05:01:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:01:43,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:43,443 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] [2020-10-14 05:01:43,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:01:43,444 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:43,444 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 1 times [2020-10-14 05:01:43,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:43,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080714136] [2020-10-14 05:01:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:01:43,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:43,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-14 05:01:43,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:01:43,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 05:01:43,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:01:43,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:43,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:43,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:43,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:43,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:44,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 05:01:44,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:44,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 05:01:44,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:44,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:44,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:01:44,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:44,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080714136] [2020-10-14 05:01:44,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:44,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:01:44,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93850719] [2020-10-14 05:01:44,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:01:44,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:01:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:01:44,123 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 13 states. [2020-10-14 05:01:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:44,512 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-14 05:01:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:01:44,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 05:01:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:44,514 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:01:44,514 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:01:44,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:01:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:01:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-14 05:01:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:01:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-14 05:01:44,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2020-10-14 05:01:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:44,523 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-14 05:01:44,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:01:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-14 05:01:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:01:44,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:44,524 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 05:01:44,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:01:44,525 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:44,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1724014721, now seen corresponding path program 2 times [2020-10-14 05:01:44,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:44,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055987310] [2020-10-14 05:01:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 05:01:44,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-14 05:01:44,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:01:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:44,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:01:44,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:44,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:44,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:44,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:44,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:44,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:44,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:44,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-14 05:01:44,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:01:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:44,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:01:44,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:45,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:45,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:01:45,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:45,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-14 05:01:45,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:45,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:01:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:01:45,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:01:45,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055987310] [2020-10-14 05:01:45,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:45,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:01:45,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788376660] [2020-10-14 05:01:45,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:01:45,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:01:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:01:45,078 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-10-14 05:01:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:45,488 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-14 05:01:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:01:45,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 05:01:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:45,491 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:01:45,491 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:01:45,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:01:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:01:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-10-14 05:01:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:01:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-14 05:01:45,502 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2020-10-14 05:01:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:45,503 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-14 05:01:45,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:01:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-14 05:01:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:01:45,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:45,508 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:45,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:01:45,508 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 458064125, now seen corresponding path program 3 times [2020-10-14 05:01:45,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:45,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063955247] [2020-10-14 05:01:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:45,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:46,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:46,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:01:46,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:46,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-14 05:01:46,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:46,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:46,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:01:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:01:46,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:01:46,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:01:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:46,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:46,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:46,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:46,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:46,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:46,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:46,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:46,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:46,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:46,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:46,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:46,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 05:01:46,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:46,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:46,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:46,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:46,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:46,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:46,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:01:46,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:46,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 05:01:46,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:46,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:01:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:01:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:46,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063955247] [2020-10-14 05:01:46,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:46,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:01:46,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832559927] [2020-10-14 05:01:46,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:01:46,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:01:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:01:46,777 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 15 states. [2020-10-14 05:01:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:47,506 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-10-14 05:01:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:01:47,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-14 05:01:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:47,509 INFO L225 Difference]: With dead ends: 68 [2020-10-14 05:01:47,510 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:01:47,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:01:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:01:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-14 05:01:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:01:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-10-14 05:01:47,525 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 34 [2020-10-14 05:01:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:47,525 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-10-14 05:01:47,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:01:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-10-14 05:01:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:01:47,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:47,527 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-14 05:01:47,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:01:47,527 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -616968385, now seen corresponding path program 4 times [2020-10-14 05:01:47,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:47,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357372407] [2020-10-14 05:01:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:47,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:48,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:48,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:01:48,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-14 05:01:48,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:48,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:01:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:01:48,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:01:48,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:48,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:48,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:48,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:48,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:48,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:48,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:48,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:48,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:48,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:48,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:48,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:48,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:48,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:48,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 05:01:48,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:48,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:48,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:48,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:48,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:48,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-14 05:01:48,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:48,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-14 05:01:48,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:48,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:01:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:01:48,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:49,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357372407] [2020-10-14 05:01:49,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:49,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:01:49,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871733529] [2020-10-14 05:01:49,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:01:49,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:01:49,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:01:49,013 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 16 states. [2020-10-14 05:01:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:49,715 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-10-14 05:01:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:01:49,716 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-14 05:01:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:49,717 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:01:49,717 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:01:49,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:01:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:01:49,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-10-14 05:01:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:01:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-14 05:01:49,744 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 35 [2020-10-14 05:01:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:49,745 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-14 05:01:49,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:01:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-14 05:01:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:01:49,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:49,747 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-14 05:01:49,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:01:49,749 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 416762173, now seen corresponding path program 5 times [2020-10-14 05:01:49,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:49,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614368181] [2020-10-14 05:01:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:49,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:50,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:50,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:01:50,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:50,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 591 [2020-10-14 05:01:50,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:50,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:01:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:01:50,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:01:50,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:50,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:50,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:50,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:50,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:50,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:50,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:50,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:50,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:50,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:50,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:50,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:50,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:50,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:50,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:50,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:50,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-14 05:01:50,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:50,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:50,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:50,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:50,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:50,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:50,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:50,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:50,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 05:01:50,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:50,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-14 05:01:50,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:50,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:01:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:50,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:50,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:51,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614368181] [2020-10-14 05:01:51,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:51,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:01:51,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909689514] [2020-10-14 05:01:51,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:01:51,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:01:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:01:51,131 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 17 states. [2020-10-14 05:01:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:52,115 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2020-10-14 05:01:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:01:52,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-14 05:01:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:52,117 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:01:52,117 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:01:52,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:01:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:01:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-14 05:01:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 05:01:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-10-14 05:01:52,131 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 36 [2020-10-14 05:01:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:52,132 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-10-14 05:01:52,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:01:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-10-14 05:01:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:01:52,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:52,133 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 05:01:52,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:01:52,134 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:52,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2005342475, now seen corresponding path program 1 times [2020-10-14 05:01:52,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:52,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148869036] [2020-10-14 05:01:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:52,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:52,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:52,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:01:52,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 05:01:52,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:52,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:01:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:52,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:01:52,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:52,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:52,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:52,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:52,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:52,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:52,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:52,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:52,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:01:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:52,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:52,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:52,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:52,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:52,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-14 05:01:52,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:52,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:52,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:01:52,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:52,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 05:01:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:52,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:52,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:52,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:01:52,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:52,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:52,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:52,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:52,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-14 05:01:52,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:52,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:01:52,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148869036] [2020-10-14 05:01:52,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:52,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:01:52,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625124247] [2020-10-14 05:01:52,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:01:52,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:01:52,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:01:52,465 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2020-10-14 05:01:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:52,721 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-10-14 05:01:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:01:52,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 05:01:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:52,723 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:01:52,723 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:01:52,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:01:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:01:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-14 05:01:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 05:01:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-14 05:01:52,734 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 36 [2020-10-14 05:01:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:52,735 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-14 05:01:52,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:01:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-14 05:01:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:01:52,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:52,742 INFO L422 BasicCegarLoop]: trace histogram [6, 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] [2020-10-14 05:01:52,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:01:52,742 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1897328897, now seen corresponding path program 6 times [2020-10-14 05:01:52,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:52,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154362717] [2020-10-14 05:01:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:52,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:52,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:53,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:53,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:01:53,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:53,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-14 05:01:53,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:53,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:53,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:01:53,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:01:53,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:01:53,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:53,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:53,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:53,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:53,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:53,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:53,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:53,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:53,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:53,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:53,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:53,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:53,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:53,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:53,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:53,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:53,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:53,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 05:01:53,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:53,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:53,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:53,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:53,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:53,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:53,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:53,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:53,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 05:01:53,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:53,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:53,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:01:53,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:53,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:01:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:54,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154362717] [2020-10-14 05:01:54,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:54,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:01:54,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823014191] [2020-10-14 05:01:54,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:01:54,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:54,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:01:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:01:54,345 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 18 states. [2020-10-14 05:01:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:55,626 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2020-10-14 05:01:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:01:55,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-14 05:01:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:55,629 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:01:55,629 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:01:55,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:01:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:01:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2020-10-14 05:01:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:01:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2020-10-14 05:01:55,646 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 37 [2020-10-14 05:01:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:55,646 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2020-10-14 05:01:55,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:01:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2020-10-14 05:01:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:01:55,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:55,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:55,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:01:55,648 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 7 times [2020-10-14 05:01:55,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:55,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81242592] [2020-10-14 05:01:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:55,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:55,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 05:01:55,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-14 05:01:55,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:55,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:55,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:01:55,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:55,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:55,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:55,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:55,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:55,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:55,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:55,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:55,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:55,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:55,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:55,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:55,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:55,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:55,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:55,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:01:55,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:55,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-14 05:01:55,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:55,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:55,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:55,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:55,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:01:55,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:55,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 05:01:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:55,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:55,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:55,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:01:55,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:55,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:55,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:55,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:55,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:55,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:01:55,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:55,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:01:55,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81242592] [2020-10-14 05:01:55,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:55,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:01:55,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703367675] [2020-10-14 05:01:55,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:01:55,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:01:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:01:55,973 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 9 states. [2020-10-14 05:01:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:56,197 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-14 05:01:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:01:56,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-14 05:01:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:56,199 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:01:56,199 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:01:56,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:01:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:01:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-14 05:01:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:01:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-10-14 05:01:56,210 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2020-10-14 05:01:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:56,210 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-10-14 05:01:56,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:01:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-10-14 05:01:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:01:56,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:56,211 INFO L422 BasicCegarLoop]: trace histogram [7, 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] [2020-10-14 05:01:56,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:01:56,212 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -619708035, now seen corresponding path program 8 times [2020-10-14 05:01:56,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:56,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489482004] [2020-10-14 05:01:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:56,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:56,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:56,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:56,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:01:56,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:56,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-14 05:01:56,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:56,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:56,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:01:56,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:01:56,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:01:56,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:56,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:56,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:56,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:56,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:01:56,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:56,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:56,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:56,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:56,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 05:01:56,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:56,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:56,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:57,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:57,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:57,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:57,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 05:01:57,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:57,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-14 05:01:57,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:57,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:57,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:01:57,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:57,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:01:57,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:57,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489482004] [2020-10-14 05:01:57,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:57,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:01:57,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760393277] [2020-10-14 05:01:57,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:01:57,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:57,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:01:57,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:01:57,799 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 19 states. [2020-10-14 05:01:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:59,590 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-14 05:01:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:01:59,592 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-14 05:01:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:59,593 INFO L225 Difference]: With dead ends: 80 [2020-10-14 05:01:59,593 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:01:59,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:01:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:01:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-10-14 05:01:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:01:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-10-14 05:01:59,607 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2020-10-14 05:01:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:59,607 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-10-14 05:01:59,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:01:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-10-14 05:01:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:01:59,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:59,608 INFO L422 BasicCegarLoop]: trace histogram [8, 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] [2020-10-14 05:01:59,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:01:59,608 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash 331833023, now seen corresponding path program 9 times [2020-10-14 05:01:59,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:59,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434693076] [2020-10-14 05:01:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:59,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:00,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:00,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:02:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:00,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-14 05:02:00,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:00,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:02:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:02:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:02:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:00,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:00,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:00,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:00,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:00,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:02:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:00,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:00,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:00,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:02:00,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:00,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-14 05:02:00,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:00,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:02:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:02:00,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:00,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:02:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:00,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:00,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:00,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:02:00,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:00,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-14 05:02:00,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:00,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:02:00,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:00,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:01,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434693076] [2020-10-14 05:02:01,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:01,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:02:01,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878136078] [2020-10-14 05:02:01,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:02:01,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:02:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:02:01,275 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 20 states. [2020-10-14 05:02:02,829 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-14 05:02:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:03,118 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-14 05:02:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:02:03,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-14 05:02:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:03,120 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:02:03,120 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:02:03,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:02:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:02:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-14 05:02:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:02:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-14 05:02:03,130 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 39 [2020-10-14 05:02:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:03,130 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-14 05:02:03,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:02:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-14 05:02:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:02:03,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:03,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:03,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:02:03,132 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1475160556, now seen corresponding path program 2 times [2020-10-14 05:02:03,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:03,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294224720] [2020-10-14 05:02:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:03,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:03,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:03,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:02:03,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:03,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-14 05:02:03,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:03,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:03,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:02:03,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:02:03,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:02:03,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:03,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:03,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:03,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:03,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:03,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:03,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:03,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:03,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:03,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:03,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:03,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:03,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:03,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:03,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:03,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:03,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-14 05:02:03,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:03,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:03,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:03,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:03,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:03,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:03,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:03,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:02:03,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:03,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 05:02:03,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:03,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:03,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:02:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:02:03,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:03,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294224720] [2020-10-14 05:02:03,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:03,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:02:03,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497818160] [2020-10-14 05:02:03,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:02:03,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:02:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:02:03,737 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 15 states. [2020-10-14 05:02:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:04,377 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-14 05:02:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:02:04,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-14 05:02:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:04,378 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:02:04,379 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:02:04,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:02:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:02:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-14 05:02:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:02:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-14 05:02:04,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 39 [2020-10-14 05:02:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:04,388 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-14 05:02:04,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:02:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-14 05:02:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:02:04,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:04,389 INFO L422 BasicCegarLoop]: trace histogram [9, 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] [2020-10-14 05:02:04,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:02:04,390 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash -235165251, now seen corresponding path program 10 times [2020-10-14 05:02:04,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:04,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247955635] [2020-10-14 05:02:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:04,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:04,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:04,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:02:04,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:04,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-14 05:02:04,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:04,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:02:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:02:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:02:04,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:05,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:05,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:05,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:05,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:05,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:05,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:02:05,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:05,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:05,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:05,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:05,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:05,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:05,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:02:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:05,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:05,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:02:05,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:05,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-14 05:02:05,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:05,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:05,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:02:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:02:05,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:05,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:02:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:05,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:05,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:05,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:05,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-14 05:02:05,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:05,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:02:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:05,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:02:05,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:02:06,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247955635] [2020-10-14 05:02:06,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:06,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:02:06,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073657124] [2020-10-14 05:02:06,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:02:06,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:06,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:02:06,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:02:06,512 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 21 states. [2020-10-14 05:02:08,333 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-14 05:02:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:08,670 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-14 05:02:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:02:08,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-10-14 05:02:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:08,672 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:02:08,672 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:02:08,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:02:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:02:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2020-10-14 05:02:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:02:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-14 05:02:08,683 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 40 [2020-10-14 05:02:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:08,683 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-14 05:02:08,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:02:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-14 05:02:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:02:08,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:08,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:08,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:02:08,684 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 848249904, now seen corresponding path program 3 times [2020-10-14 05:02:08,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:08,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926195400] [2020-10-14 05:02:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:09,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:09,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:02:09,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:09,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-14 05:02:09,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:09,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:09,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:02:09,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:09,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:09,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:09,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:09,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:09,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:09,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:09,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:09,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:09,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:09,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:09,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:09,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:09,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:09,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:09,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:09,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-14 05:02:09,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:09,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:09,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:02:09,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:09,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:02:09,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:09,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:09,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:09,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:09,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:02:09,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:09,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 05:02:09,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:09,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:02:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:09,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:02:09,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:02:09,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926195400] [2020-10-14 05:02:09,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:09,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:02:09,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278119948] [2020-10-14 05:02:09,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:02:09,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:02:09,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:02:09,413 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 12 states. [2020-10-14 05:02:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:09,863 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2020-10-14 05:02:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:02:09,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 05:02:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:09,865 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:02:09,865 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:02:09,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:02:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:02:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-10-14 05:02:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:02:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2020-10-14 05:02:09,877 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 40 [2020-10-14 05:02:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:09,878 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2020-10-14 05:02:09,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:02:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2020-10-14 05:02:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:02:09,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:09,879 INFO L422 BasicCegarLoop]: trace histogram [10, 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] [2020-10-14 05:02:09,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:02:09,879 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -632242561, now seen corresponding path program 11 times [2020-10-14 05:02:09,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:09,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127991322] [2020-10-14 05:02:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:09,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:10,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:10,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:02:10,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:10,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 05:02:10,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:10,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:10,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:02:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:02:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:02:10,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:10,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:10,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:10,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:10,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:10,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:02:10,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:10,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:10,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:10,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:02:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:10,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:10,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:10,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:02:10,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:02:10,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:10,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:02:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:02:10,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:10,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:02:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:10,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:10,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:10,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:02:10,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:10,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:02:10,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:10,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:02:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:10,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:02:10,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:02:11,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127991322] [2020-10-14 05:02:11,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:11,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:02:11,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216884023] [2020-10-14 05:02:11,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:02:11,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:02:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:02:11,024 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand 16 states. [2020-10-14 05:02:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:11,529 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2020-10-14 05:02:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:02:11,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-14 05:02:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:11,530 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:02:11,530 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:02:11,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:02:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:02:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-14 05:02:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:02:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-14 05:02:11,546 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 41 [2020-10-14 05:02:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:11,546 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-14 05:02:11,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:02:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-14 05:02:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:02:11,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:11,547 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:11,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:02:11,548 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:11,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1406111124, now seen corresponding path program 4 times [2020-10-14 05:02:11,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:11,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589309996] [2020-10-14 05:02:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:11,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:11,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:11,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:11,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:02:11,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:11,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-14 05:02:11,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:11,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:02:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:02:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:12,364 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-10-14 05:02:12,753 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2020-10-14 05:02:12,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:12,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:12,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:12,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:12,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:12,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:12,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:12,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:12,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:12,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:12,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:12,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:12,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:12,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-14 05:02:12,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:12,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:12,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:13,152 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-14 05:02:13,344 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-14 05:02:13,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:13,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:13,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:13,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-14 05:02:13,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-14 05:02:13,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:13,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:02:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:13,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:02:13,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:13,919 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-14 05:02:14,088 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-14 05:02:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:14,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589309996] [2020-10-14 05:02:14,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:14,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:02:14,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213573442] [2020-10-14 05:02:14,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:02:14,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:14,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:02:14,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:02:14,102 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 17 states. [2020-10-14 05:02:14,548 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-14 05:02:15,298 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-14 05:02:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:15,442 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2020-10-14 05:02:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:02:15,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-14 05:02:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:15,444 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:02:15,444 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:02:15,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:02:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:02:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-14 05:02:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:02:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-14 05:02:15,454 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 41 [2020-10-14 05:02:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:15,454 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-14 05:02:15,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:02:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-14 05:02:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:02:15,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:15,455 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:15,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:02:15,456 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:15,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1723141040, now seen corresponding path program 5 times [2020-10-14 05:02:15,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:15,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242618205] [2020-10-14 05:02:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:15,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:15,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:16,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:16,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:02:16,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:16,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-14 05:02:16,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:16,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:02:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:16,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:02:16,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:16,501 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-14 05:02:16,655 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-14 05:02:16,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:16,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:16,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:16,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:16,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:16,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:16,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:16,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:16,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:16,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:16,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:16,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:16,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 05:02:16,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:16,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:16,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:16,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:17,094 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-14 05:02:17,268 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-14 05:02:17,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:17,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 05:02:17,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-14 05:02:17,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:17,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:02:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:02:17,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:17,642 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-14 05:02:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:18,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242618205] [2020-10-14 05:02:18,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:18,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:02:18,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749393347] [2020-10-14 05:02:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:02:18,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:02:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:02:18,036 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 18 states. [2020-10-14 05:02:18,495 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 05:02:19,334 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-14 05:02:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:19,530 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-14 05:02:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:02:19,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 05:02:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:19,532 INFO L225 Difference]: With dead ends: 79 [2020-10-14 05:02:19,532 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:02:19,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:02:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:02:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-14 05:02:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:02:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-14 05:02:19,542 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 42 [2020-10-14 05:02:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:19,543 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-14 05:02:19,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:02:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-14 05:02:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:02:19,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:19,544 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:19,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:02:19,544 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash -54289684, now seen corresponding path program 6 times [2020-10-14 05:02:19,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:19,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031083271] [2020-10-14 05:02:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:19,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:20,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:20,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:02:20,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:20,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 921 [2020-10-14 05:02:20,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:20,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:20,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:02:20,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:20,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:02:20,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:20,996 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-14 05:02:21,473 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-14 05:02:21,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:21,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:21,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:21,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:21,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:21,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:21,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:21,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:21,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:21,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:21,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:21,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:21,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:21,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:21,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-14 05:02:21,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:21,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:21,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:21,966 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-10-14 05:02:22,160 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2020-10-14 05:02:22,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:22,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:22,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:02:22,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:22,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 05:02:22,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:22,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:02:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:02:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:22,622 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-14 05:02:22,901 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2020-10-14 05:02:23,431 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 66 [2020-10-14 05:02:23,979 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 79 [2020-10-14 05:02:24,326 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 67 [2020-10-14 05:02:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:24,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031083271] [2020-10-14 05:02:24,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:24,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:02:24,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302020837] [2020-10-14 05:02:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:02:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:02:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:02:24,346 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 19 states. [2020-10-14 05:02:24,848 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-14 05:02:25,555 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-14 05:02:25,806 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-14 05:02:26,187 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-10-14 05:02:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:26,444 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2020-10-14 05:02:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:02:26,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-14 05:02:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:26,446 INFO L225 Difference]: With dead ends: 83 [2020-10-14 05:02:26,447 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 05:02:26,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:02:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 05:02:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-10-14 05:02:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:02:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-14 05:02:26,459 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 43 [2020-10-14 05:02:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:26,459 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-14 05:02:26,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:02:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-14 05:02:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:02:26,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:26,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:26,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:02:26,460 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash 271633402, now seen corresponding path program 7 times [2020-10-14 05:02:26,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:26,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065964124] [2020-10-14 05:02:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:26,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:26,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:26,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:26,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:02:26,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:26,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-14 05:02:26,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:26,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:02:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:02:26,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:26,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:26,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:26,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:26,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:26,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:26,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:26,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:26,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:26,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:26,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:02:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:26,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:26,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:02:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 05:02:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:27,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:02:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:02:27,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065964124] [2020-10-14 05:02:27,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:27,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:02:27,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613861843] [2020-10-14 05:02:27,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:02:27,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:02:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:02:27,019 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 12 states. [2020-10-14 05:02:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:27,347 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-14 05:02:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:02:27,349 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-14 05:02:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:27,350 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:02:27,350 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:02:27,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:02:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:02:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-14 05:02:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:02:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-14 05:02:27,360 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 43 [2020-10-14 05:02:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:27,360 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-14 05:02:27,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:02:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-14 05:02:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:02:27,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:27,361 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:27,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:02:27,362 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 679932720, now seen corresponding path program 8 times [2020-10-14 05:02:27,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:27,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615598439] [2020-10-14 05:02:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:28,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:28,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:02:28,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:28,913 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-14 05:02:29,361 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-14 05:02:29,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:29,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:29,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:29,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:29,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:29,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:29,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:29,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:29,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:29,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:29,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:29,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:29,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:29,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:29,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:29,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:29,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:29,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-14 05:02:29,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:29,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:29,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:29,841 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-14 05:02:30,071 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-14 05:02:30,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 05:02:30,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 05:02:30,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:30,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:02:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:02:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:31,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615598439] [2020-10-14 05:02:31,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:31,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:02:31,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320951174] [2020-10-14 05:02:31,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:02:31,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:02:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:02:31,092 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 20 states. [2020-10-14 05:02:31,585 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 05:02:32,735 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-14 05:02:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:32,998 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-10-14 05:02:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:02:32,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-14 05:02:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:33,000 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:02:33,000 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:02:33,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:02:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:02:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-14 05:02:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 05:02:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-10-14 05:02:33,012 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 44 [2020-10-14 05:02:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:33,012 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-14 05:02:33,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:02:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-10-14 05:02:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:02:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:33,013 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:33,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:02:33,013 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1433243179, now seen corresponding path program 9 times [2020-10-14 05:02:33,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:33,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744703003] [2020-10-14 05:02:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:33,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:33,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:33,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:02:33,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:33,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:33,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:33,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:33,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:33,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:33,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:33,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:33,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:33,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:33,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:33,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:33,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:02:33,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:33,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 05:02:33,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:33,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:33,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:02:33,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:33,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-14 05:02:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:33,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:33,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:33,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:02:33,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744703003] [2020-10-14 05:02:33,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:33,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:02:33,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155488031] [2020-10-14 05:02:33,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:02:33,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:02:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:02:33,532 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 11 states. [2020-10-14 05:02:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:33,818 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-14 05:02:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:02:33,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-14 05:02:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:33,820 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:02:33,820 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:02:33,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:02:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:02:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-10-14 05:02:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:02:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-14 05:02:33,829 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 44 [2020-10-14 05:02:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:33,829 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-14 05:02:33,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:02:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-14 05:02:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:02:33,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:33,830 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:33,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:02:33,830 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:33,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1965990764, now seen corresponding path program 10 times [2020-10-14 05:02:33,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:33,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841778916] [2020-10-14 05:02:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:33,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:33,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:34,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:34,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:02:34,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:34,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-14 05:02:34,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:34,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:34,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:02:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:02:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:34,766 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2020-10-14 05:02:35,051 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2020-10-14 05:02:35,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:35,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:35,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:35,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:35,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:35,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:35,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:35,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:35,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:35,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:35,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:35,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:35,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:35,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:35,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 05:02:35,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:35,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:35,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:35,427 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-14 05:02:35,583 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-14 05:02:35,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:35,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:35,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:35,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:02:35,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:35,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:02:35,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:35,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:35,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:02:35,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:35,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:35,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:36,443 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-14 05:02:36,654 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-14 05:02:36,877 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2020-10-14 05:02:37,064 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-14 05:02:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:37,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841778916] [2020-10-14 05:02:37,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:37,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:02:37,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078208618] [2020-10-14 05:02:37,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:02:37,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:02:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:02:37,086 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 21 states. [2020-10-14 05:02:39,159 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2020-10-14 05:02:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:39,476 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-10-14 05:02:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:02:39,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-14 05:02:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:39,478 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:02:39,479 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:02:39,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:02:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:02:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2020-10-14 05:02:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:02:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-10-14 05:02:39,488 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 45 [2020-10-14 05:02:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:39,489 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-10-14 05:02:39,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:02:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-10-14 05:02:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:02:39,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:39,490 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:39,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:02:39,490 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1115882832, now seen corresponding path program 11 times [2020-10-14 05:02:39,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:39,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763731052] [2020-10-14 05:02:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:39,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:39,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:40,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:40,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:02:40,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:40,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-14 05:02:40,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:40,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:02:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:40,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:02:40,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:40,880 WARN L193 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 76 [2020-10-14 05:02:41,421 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 74 [2020-10-14 05:02:41,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:41,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:41,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:41,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:41,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:41,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:41,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:41,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:41,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:41,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:41,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:41,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:41,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:41,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:41,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:41,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-14 05:02:41,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:41,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:41,948 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-14 05:02:42,202 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-14 05:02:42,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:42,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:42,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:42,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:42,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:02:42,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:43,033 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 05:02:43,243 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-14 05:02:43,453 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-14 05:02:43,655 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-14 05:02:43,844 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-14 05:02:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:43,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763731052] [2020-10-14 05:02:43,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:43,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:02:43,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54379787] [2020-10-14 05:02:43,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:02:43,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:02:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:02:43,871 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 22 states. [2020-10-14 05:02:44,534 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-14 05:02:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:46,460 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-10-14 05:02:46,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:02:46,463 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-14 05:02:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:46,463 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:02:46,464 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:02:46,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:02:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:02:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2020-10-14 05:02:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:02:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-10-14 05:02:46,476 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 46 [2020-10-14 05:02:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:46,477 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-10-14 05:02:46,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:02:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-10-14 05:02:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:02:46,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:46,478 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:46,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:02:46,478 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1210326941, now seen corresponding path program 12 times [2020-10-14 05:02:46,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:46,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365926471] [2020-10-14 05:02:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:46,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:46,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:46,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:02:46,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:46,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-14 05:02:46,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:46,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:02:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 05:02:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:02:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:47,078 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-10-14 05:02:47,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:47,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:47,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:47,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:47,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:47,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:47,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:47,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:47,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:47,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:47,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:02:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:47,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:47,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:47,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:02:47,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:47,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-14 05:02:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:47,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:02:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:02:47,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:02:47,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:02:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:47,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:47,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:47,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:02:47,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:02:47,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365926471] [2020-10-14 05:02:47,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:47,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:02:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665714999] [2020-10-14 05:02:47,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:02:47,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:02:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:02:47,775 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 17 states. [2020-10-14 05:02:48,425 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-10-14 05:02:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:48,902 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-10-14 05:02:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:02:48,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-14 05:02:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:48,904 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:02:48,904 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 05:02:48,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:02:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 05:02:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2020-10-14 05:02:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:02:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-10-14 05:02:48,917 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 46 [2020-10-14 05:02:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:48,917 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-10-14 05:02:48,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:02:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-10-14 05:02:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:02:48,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:48,918 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:48,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:02:48,919 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2130283500, now seen corresponding path program 13 times [2020-10-14 05:02:48,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:48,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023391572] [2020-10-14 05:02:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:48,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:49,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:49,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:49,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:02:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:50,048 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 96 [2020-10-14 05:02:50,596 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 96 [2020-10-14 05:02:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:50,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:50,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:50,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:02:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:50,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:50,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:02:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:51,326 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-14 05:02:51,791 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-14 05:02:51,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:02:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:51,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:02:51,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:02:51,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:52,390 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-14 05:02:52,752 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-14 05:02:53,065 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-14 05:02:53,339 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-14 05:02:53,639 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-14 05:02:54,044 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-14 05:02:54,625 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2020-10-14 05:02:55,107 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-14 05:02:55,745 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-14 05:02:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:02:55,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023391572] [2020-10-14 05:02:55,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:02:55,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:02:55,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98771014] [2020-10-14 05:02:55,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:02:55,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:02:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:02:55,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:02:55,773 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 23 states. [2020-10-14 05:02:56,441 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-14 05:02:58,131 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-14 05:02:58,380 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-14 05:02:58,865 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2020-10-14 05:02:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:02:59,283 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-14 05:02:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:02:59,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-14 05:02:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:02:59,284 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:02:59,285 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:02:59,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:02:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:02:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-10-14 05:02:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:02:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-10-14 05:02:59,296 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 47 [2020-10-14 05:02:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:02:59,296 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-10-14 05:02:59,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:02:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-10-14 05:02:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:02:59,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:02:59,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:02:59,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:02:59,297 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:02:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:02:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1228342431, now seen corresponding path program 14 times [2020-10-14 05:02:59,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:02:59,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540683855] [2020-10-14 05:02:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:02:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:59,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:59,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:02:59,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:59,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-14 05:02:59,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:59,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:02:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:02:59,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:02:59,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:59,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:02:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:59,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:59,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:59,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:02:59,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:59,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:02:59,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:59,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:59,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:02:59,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:59,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:02:59,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:59,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:02:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:59,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:59,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:59,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:02:59,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:02:59,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-14 05:02:59,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:59,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:02:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:02:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:02:59,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:02:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:02:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:02:59,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:02:59,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-14 05:02:59,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:02:59,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 05:02:59,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:02:59,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:02:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:02:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:02:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:02:59,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 05:03:00,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540683855] [2020-10-14 05:03:00,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:00,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:03:00,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488379387] [2020-10-14 05:03:00,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:03:00,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:03:00,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:03:00,097 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 14 states. [2020-10-14 05:03:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:00,669 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2020-10-14 05:03:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:03:00,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-14 05:03:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:00,671 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:03:00,671 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:03:00,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:03:00,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:03:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-14 05:03:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:03:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-10-14 05:03:00,689 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 47 [2020-10-14 05:03:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:00,691 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-10-14 05:03:00,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:03:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-10-14 05:03:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:03:00,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:00,692 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:00,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:03:00,693 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -317775312, now seen corresponding path program 15 times [2020-10-14 05:03:00,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:00,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367694669] [2020-10-14 05:03:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:00,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:00,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:01,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:01,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:03:01,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:01,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-14 05:03:01,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:01,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:03:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:03:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:03:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:01,418 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2020-10-14 05:03:01,575 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 91 [2020-10-14 05:03:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:01,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:01,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:01,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:01,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:01,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:01,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:01,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:03:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:01,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:01,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:01,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:03:01,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:03:01,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:01,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:03:01,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:01,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:03:01,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:01,869 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2020-10-14 05:03:02,043 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-14 05:03:02,209 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-14 05:03:02,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:03:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:03:02,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:03:02,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:02,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:03:03,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367694669] [2020-10-14 05:03:03,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:03,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:03:03,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374239489] [2020-10-14 05:03:03,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:03:03,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:03:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:03:03,690 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 24 states. [2020-10-14 05:03:04,264 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-14 05:03:06,179 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-14 05:03:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:06,614 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2020-10-14 05:03:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:03:06,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-14 05:03:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:06,617 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:03:06,617 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 05:03:06,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:03:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 05:03:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2020-10-14 05:03:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:03:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-10-14 05:03:06,632 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 48 [2020-10-14 05:03:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:06,632 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-10-14 05:03:06,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:03:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-10-14 05:03:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:03:06,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:06,633 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:06,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:03:06,634 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1786822621, now seen corresponding path program 16 times [2020-10-14 05:03:06,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:06,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227315645] [2020-10-14 05:03:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:06,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:06,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:07,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:03:07,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:08,423 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 213 DAG size of output: 38 [2020-10-14 05:03:09,882 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 213 DAG size of output: 40 [2020-10-14 05:03:09,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:09,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:09,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:09,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:09,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:09,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:09,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:09,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:09,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:09,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:09,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:03:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:09,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:10,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:10,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:10,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:10,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-14 05:03:10,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:10,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:10,467 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 25 [2020-10-14 05:03:10,875 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2020-10-14 05:03:11,439 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 54 [2020-10-14 05:03:12,043 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-10-14 05:03:12,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:03:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:12,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:12,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:12,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 05:03:12,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:12,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 05:03:12,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:12,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:03:12,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:03:12,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:03:12,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:03:12,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227315645] [2020-10-14 05:03:12,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:12,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:03:12,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960204566] [2020-10-14 05:03:12,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:03:12,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:12,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:03:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:12,595 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 19 states. [2020-10-14 05:03:13,191 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-14 05:03:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:13,995 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-14 05:03:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:03:13,995 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-14 05:03:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:13,997 INFO L225 Difference]: With dead ends: 97 [2020-10-14 05:03:13,997 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:03:13,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:03:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:03:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-10-14 05:03:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:03:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2020-10-14 05:03:14,012 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 48 [2020-10-14 05:03:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:14,012 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2020-10-14 05:03:14,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:03:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2020-10-14 05:03:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:03:14,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:14,014 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:14,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:03:14,014 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1101812844, now seen corresponding path program 17 times [2020-10-14 05:03:14,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:14,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086679579] [2020-10-14 05:03:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:14,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:14,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:14,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:14,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:03:14,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:14,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-14 05:03:14,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:14,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:03:14,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:03:14,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:03:14,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:15,095 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 72 [2020-10-14 05:03:15,391 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 71 [2020-10-14 05:03:15,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:15,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:15,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:15,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:15,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:15,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:15,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:15,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:15,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:03:15,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:03:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:15,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:15,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:15,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:03:15,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:15,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-14 05:03:15,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:15,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:03:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:15,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:03:15,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:15,865 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-14 05:03:16,067 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-14 05:03:16,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:03:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:16,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:16,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:16,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:16,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:16,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-14 05:03:16,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:16,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:03:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:03:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:03:16,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:03:17,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086679579] [2020-10-14 05:03:17,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:17,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:03:17,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501018007] [2020-10-14 05:03:17,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:03:17,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:03:17,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:03:17,872 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand 25 states. [2020-10-14 05:03:18,526 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 05:03:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:21,379 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2020-10-14 05:03:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:03:21,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-14 05:03:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:21,381 INFO L225 Difference]: With dead ends: 114 [2020-10-14 05:03:21,381 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 05:03:21,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:03:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 05:03:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2020-10-14 05:03:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 05:03:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2020-10-14 05:03:21,401 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 49 [2020-10-14 05:03:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:21,401 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2020-10-14 05:03:21,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:03:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2020-10-14 05:03:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:03:21,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:21,402 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:21,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:03:21,403 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:21,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1919839327, now seen corresponding path program 18 times [2020-10-14 05:03:21,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:21,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355385114] [2020-10-14 05:03:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:21,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:21,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:21,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:03:21,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:21,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-14 05:03:21,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:21,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:03:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:03:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:03:21,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:27,484 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 634 DAG size of output: 68 [2020-10-14 05:03:33,017 WARN L193 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 634 DAG size of output: 66 [2020-10-14 05:03:33,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:33,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:33,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:33,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:33,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:03:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:33,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:33,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:33,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:33,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-14 05:03:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:33,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:33,732 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 20 [2020-10-14 05:03:35,419 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 375 DAG size of output: 43 [2020-10-14 05:03:37,432 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 342 DAG size of output: 71 [2020-10-14 05:03:39,256 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 342 DAG size of output: 63 [2020-10-14 05:03:39,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:03:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:39,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:39,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:39,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:03:39,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:39,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 05:03:39,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:39,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:03:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:03:39,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:03:39,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:39,786 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-14 05:03:40,081 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-14 05:03:40,392 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-14 05:03:40,638 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-14 05:03:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:03:40,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355385114] [2020-10-14 05:03:40,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:40,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:03:40,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036819464] [2020-10-14 05:03:40,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:03:40,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:03:40,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:03:40,661 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand 20 states. [2020-10-14 05:03:41,724 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 116 [2020-10-14 05:03:42,516 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-14 05:03:42,928 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 98 [2020-10-14 05:03:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:43,229 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2020-10-14 05:03:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:03:43,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-14 05:03:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:43,231 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:03:43,231 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 05:03:43,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:03:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 05:03:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-10-14 05:03:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 05:03:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 118 transitions. [2020-10-14 05:03:43,250 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 118 transitions. Word has length 49 [2020-10-14 05:03:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:43,250 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 118 transitions. [2020-10-14 05:03:43,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:03:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 118 transitions. [2020-10-14 05:03:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:03:43,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:43,252 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:43,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:03:43,252 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2135594576, now seen corresponding path program 19 times [2020-10-14 05:03:43,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:43,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927230542] [2020-10-14 05:03:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:43,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:03:44,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:44,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-14 05:03:44,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:03:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 05:03:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:03:44,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:44,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:44,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-14 05:03:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:03:44,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-14 05:03:44,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:03:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:44,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:03:44,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:03:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:44,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:44,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:44,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:03:44,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:44,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-14 05:03:44,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:44,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:03:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:03:44,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:03:44,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:03:44,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927230542] [2020-10-14 05:03:44,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:03:44,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:03:44,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805797851] [2020-10-14 05:03:44,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:03:44,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:03:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:03:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:03:44,938 INFO L87 Difference]: Start difference. First operand 88 states and 118 transitions. Second operand 19 states. [2020-10-14 05:03:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:03:45,784 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2020-10-14 05:03:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:03:45,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-14 05:03:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:03:45,790 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:03:45,790 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:03:45,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:03:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:03:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-14 05:03:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:03:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-10-14 05:03:45,802 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 50 [2020-10-14 05:03:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:03:45,802 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-10-14 05:03:45,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:03:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-10-14 05:03:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:03:45,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:03:45,803 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:03:45,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:03:45,803 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:03:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:03:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1748389917, now seen corresponding path program 20 times [2020-10-14 05:03:45,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:03:45,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463743435] [2020-10-14 05:03:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:03:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:45,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:46,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:46,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:03:46,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:49,177 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 365 DAG size of output: 43 [2020-10-14 05:03:51,834 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 365 DAG size of output: 38 [2020-10-14 05:03:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:03:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:03:51,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:03:51,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:03:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:51,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:03:51,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:51,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:03:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:51,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:03:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:03:51,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:52,605 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2020-10-14 05:03:57,370 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 1292 DAG size of output: 45 [2020-10-14 05:03:58,196 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2020-10-14 05:03:59,043 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 69 [2020-10-14 05:03:59,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:03:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:03:59,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:03:59,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:03:59,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 05:03:59,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:03:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:03:59,536 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-14 05:03:59,769 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-14 05:04:00,015 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 05:04:00,280 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 05:04:00,487 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-14 05:04:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:04:00,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463743435] [2020-10-14 05:04:00,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:00,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:00,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679643329] [2020-10-14 05:04:00,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:00,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:00,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:00,512 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 21 states. [2020-10-14 05:04:01,263 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 05:04:02,676 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-14 05:04:03,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:03,000 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2020-10-14 05:04:03,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:04:03,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-14 05:04:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:03,002 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:04:03,002 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:04:03,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:04:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:04:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-10-14 05:04:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:04:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-10-14 05:04:03,017 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 50 [2020-10-14 05:04:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:03,017 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-10-14 05:04:03,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-10-14 05:04:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:04:03,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:03,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:03,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:04:03,018 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1160968811, now seen corresponding path program 21 times [2020-10-14 05:04:03,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:03,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052542615] [2020-10-14 05:04:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:04:03,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:03,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:03,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-14 05:04:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:04:03,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:04:03,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 05:04:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:03,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:03,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:03,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-14 05:04:03,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:04:03,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:03,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:03,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:04:03,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052542615] [2020-10-14 05:04:03,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:03,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:04:03,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55384548] [2020-10-14 05:04:03,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:04:03,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:04:03,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:04:03,784 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 14 states. [2020-10-14 05:04:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:04,140 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2020-10-14 05:04:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:04,141 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-14 05:04:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:04,141 INFO L225 Difference]: With dead ends: 103 [2020-10-14 05:04:04,141 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 05:04:04,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 05:04:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-10-14 05:04:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:04:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-10-14 05:04:04,153 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 50 [2020-10-14 05:04:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:04,153 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-10-14 05:04:04,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:04:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-10-14 05:04:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:04:04,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:04,154 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:04,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:04:04,154 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash 728425503, now seen corresponding path program 22 times [2020-10-14 05:04:04,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:04,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289517062] [2020-10-14 05:04:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:04,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:04,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:05,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:04:05,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:04:05,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:07,842 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 414 DAG size of output: 120 [2020-10-14 05:04:10,918 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 414 DAG size of output: 133 [2020-10-14 05:04:10,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:10,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:10,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:04:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:04:11,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:04:11,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:11,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:04:11,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:11,961 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 26 [2020-10-14 05:04:13,110 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 337 DAG size of output: 67 [2020-10-14 05:04:15,665 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 511 DAG size of output: 104 [2020-10-14 05:04:18,323 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 511 DAG size of output: 105 [2020-10-14 05:04:18,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:04:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:18,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:18,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:04:18,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:18,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 05:04:18,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:18,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:04:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:04:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:04:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:19,092 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-10-14 05:04:19,468 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-14 05:04:20,079 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2020-10-14 05:04:21,043 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2020-10-14 05:04:21,733 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-10-14 05:04:22,403 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2020-10-14 05:04:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:04:22,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289517062] [2020-10-14 05:04:22,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:22,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:22,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456706975] [2020-10-14 05:04:22,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:22,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:22,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:22,438 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 22 states. [2020-10-14 05:04:23,506 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-14 05:04:25,315 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2020-10-14 05:04:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:25,664 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-10-14 05:04:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:04:25,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-14 05:04:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:25,666 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:04:25,666 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:04:25,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:04:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:04:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2020-10-14 05:04:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:04:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-14 05:04:25,682 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2020-10-14 05:04:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:25,682 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-14 05:04:25,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-14 05:04:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:04:25,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:25,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:25,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:04:25,684 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:25,684 INFO L82 PathProgramCache]: Analyzing trace with hash -355517926, now seen corresponding path program 23 times [2020-10-14 05:04:25,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:25,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823820343] [2020-10-14 05:04:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:25,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 05:04:26,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:04:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:26,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:26,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:26,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:26,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:26,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:04:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:04:26,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:04:26,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 05:04:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-14 05:04:26,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:04:26,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:04:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:04:26,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823820343] [2020-10-14 05:04:26,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:26,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:04:26,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302510086] [2020-10-14 05:04:26,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:04:26,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:04:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:04:26,470 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 13 states. [2020-10-14 05:04:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:26,865 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2020-10-14 05:04:26,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:04:26,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-14 05:04:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:26,866 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:04:26,866 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:04:26,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:04:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2020-10-14 05:04:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 05:04:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-14 05:04:26,877 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 51 [2020-10-14 05:04:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:26,878 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-14 05:04:26,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:04:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-14 05:04:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:04:26,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:26,879 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:26,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:04:26,879 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:26,879 INFO L82 PathProgramCache]: Analyzing trace with hash -825700259, now seen corresponding path program 24 times [2020-10-14 05:04:26,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:26,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859058444] [2020-10-14 05:04:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:28,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:04:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:04:28,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:04:28,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:31,633 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 454 DAG size of output: 118 [2020-10-14 05:04:35,307 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 454 DAG size of output: 108 [2020-10-14 05:04:35,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:35,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:35,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:35,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:35,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:35,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:35,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:04:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:35,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:35,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:04:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:36,328 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 27 [2020-10-14 05:04:38,739 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 468 DAG size of output: 61 [2020-10-14 05:04:41,555 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 494 DAG size of output: 82 [2020-10-14 05:04:44,425 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 494 DAG size of output: 74 [2020-10-14 05:04:44,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:04:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:44,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:04:44,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:04:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:45,102 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-14 05:04:45,390 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-14 05:04:45,765 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-14 05:04:46,108 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-14 05:04:46,578 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-14 05:04:46,964 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-14 05:04:47,402 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-14 05:04:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:04:47,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859058444] [2020-10-14 05:04:47,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:47,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:04:47,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088551573] [2020-10-14 05:04:47,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:04:47,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:47,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:04:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:47,435 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 23 states. [2020-10-14 05:04:48,267 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 05:04:50,184 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-14 05:04:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:50,580 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-10-14 05:04:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:04:50,580 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 05:04:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:50,582 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:04:50,582 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 05:04:50,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:04:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 05:04:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 69. [2020-10-14 05:04:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:04:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-10-14 05:04:50,594 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 52 [2020-10-14 05:04:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:50,595 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-10-14 05:04:50,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:04:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-10-14 05:04:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:04:50,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:50,595 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:50,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:04:50,596 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:50,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:50,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1758958625, now seen corresponding path program 25 times [2020-10-14 05:04:50,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:50,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117141645] [2020-10-14 05:04:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:50,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:51,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:51,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:04:51,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:56,162 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 457 DAG size of output: 148 [2020-10-14 05:04:59,551 WARN L193 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 457 DAG size of output: 157 [2020-10-14 05:04:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:59,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:59,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:59,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:59,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:59,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:59,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 05:04:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:59,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:59,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:59,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:04:59,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-14 05:04:59,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:59,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:59,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:04:59,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:00,644 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 57 [2020-10-14 05:05:02,112 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 282 DAG size of output: 91 [2020-10-14 05:05:03,525 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 282 DAG size of output: 93 [2020-10-14 05:05:03,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:05:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:03,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:03,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:03,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:05:03,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:03,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-14 05:05:03,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:03,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:05:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:05:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:05:03,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:04,409 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-14 05:05:04,839 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 42 [2020-10-14 05:05:05,746 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-10-14 05:05:06,405 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 66 [2020-10-14 05:05:07,080 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 69 [2020-10-14 05:05:07,841 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 75 [2020-10-14 05:05:08,887 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 86 [2020-10-14 05:05:09,832 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 92 [2020-10-14 05:05:10,563 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 103 [2020-10-14 05:05:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:05:10,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117141645] [2020-10-14 05:05:10,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:10,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:05:10,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024885067] [2020-10-14 05:05:10,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:05:10,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:05:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:05:10,605 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 24 states. [2020-10-14 05:05:11,623 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-14 05:05:12,618 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-14 05:05:12,893 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-14 05:05:13,216 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-14 05:05:13,645 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-14 05:05:13,974 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-14 05:05:14,335 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-14 05:05:15,680 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 154 DAG size of output: 144 [2020-10-14 05:05:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:16,210 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-14 05:05:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:05:16,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-14 05:05:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:16,212 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:05:16,212 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 05:05:16,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:05:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 05:05:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-14 05:05:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:05:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-10-14 05:05:16,231 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 53 [2020-10-14 05:05:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:16,231 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-10-14 05:05:16,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:05:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-10-14 05:05:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:05:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:16,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:16,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:05:16,233 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash 157000204, now seen corresponding path program 26 times [2020-10-14 05:05:16,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:16,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438035241] [2020-10-14 05:05:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:16,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:17,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:17,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:05:17,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:17,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-14 05:05:17,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:17,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:17,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:05:17,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 05:05:17,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:05:17,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:05:18,897 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 243 DAG size of output: 39 [2020-10-14 05:05:20,470 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 243 DAG size of output: 39 [2020-10-14 05:05:20,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:20,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:20,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:20,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:20,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:20,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-14 05:05:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:05:20,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:20,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:05:20,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:21,234 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 47 [2020-10-14 05:05:21,781 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-10-14 05:05:22,202 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-10-14 05:05:22,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 05:05:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:22,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:05:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:05:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:22,585 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-14 05:05:22,762 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-14 05:05:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 05:05:22,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438035241] [2020-10-14 05:05:22,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:22,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:05:22,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194879272] [2020-10-14 05:05:22,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:05:22,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:05:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:05:22,903 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 19 states. [2020-10-14 05:05:23,696 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 33 [2020-10-14 05:05:24,310 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 108 [2020-10-14 05:05:24,959 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-14 05:05:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:25,140 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-14 05:05:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:05:25,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-14 05:05:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:25,141 INFO L225 Difference]: With dead ends: 83 [2020-10-14 05:05:25,141 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:05:25,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:05:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:05:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-14 05:05:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:05:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-10-14 05:05:25,156 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 53 [2020-10-14 05:05:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:25,156 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-10-14 05:05:25,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:05:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-10-14 05:05:25,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:05:25,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:25,157 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:25,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:05:25,157 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:25,158 INFO L82 PathProgramCache]: Analyzing trace with hash -625196899, now seen corresponding path program 27 times [2020-10-14 05:05:25,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:25,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540811173] [2020-10-14 05:05:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:25,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:26,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:26,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:05:26,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:26,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-14 05:05:26,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:26,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:26,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:05:26,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:05:26,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:05:26,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:29,802 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 574 DAG size of output: 36