/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=NARROWEST --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/heap-data/cart.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:25:05,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:25:05,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:25:05,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:25:05,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:25:05,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:25:05,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:25:05,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:25:05,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:25:05,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:25:05,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:25:05,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:25:05,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:25:05,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:25:05,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:25:05,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:25:05,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:25:05,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:25:05,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:25:05,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:25:05,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:25:05,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:25:05,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:25:05,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:25:05,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:25:05,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:25:05,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:25:05,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:25:05,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:25:05,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:25:05,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:25:05,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:25:05,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:25:05,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:25:05,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:25:05,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:25:05,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:25:05,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:25:05,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:25:05,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:25:05,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:25:05,516 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 [2020-10-13 10:25:05,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:25:05,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:25:05,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:25:05,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:25:05,540 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:25:05,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:25:05,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:25:05,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:25:05,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:25:05,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:25:05,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:25:05,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:25:05,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:25:05,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:25:05,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:25:05,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:25:05,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:25:05,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:25:05,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:25:05,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:25:05,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:25:05,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:25:05,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:25:05,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:25:05,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:25:05,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:25:05,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:25:05,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:25:05,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:25:05,545 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:25:05,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:25:05,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:25:05,893 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:25:05,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:25:05,896 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:25:05,896 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/cart.i [2020-10-13 10:25:05,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/636cbe48b/f55a287edab3416b8f0e3617f7bd84d6/FLAG122eee097 [2020-10-13 10:25:06,522 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:25:06,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/cart.i [2020-10-13 10:25:06,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/636cbe48b/f55a287edab3416b8f0e3617f7bd84d6/FLAG122eee097 [2020-10-13 10:25:06,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/636cbe48b/f55a287edab3416b8f0e3617f7bd84d6 [2020-10-13 10:25:06,775 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:25:06,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:25:06,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:25:06,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:25:06,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:25:06,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:25:06" (1/1) ... [2020-10-13 10:25:06,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df63da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:06, skipping insertion in model container [2020-10-13 10:25:06,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:25:06" (1/1) ... [2020-10-13 10:25:06,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:25:06,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:25:07,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:25:07,326 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:25:07,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:25:07,440 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:25:07,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07 WrapperNode [2020-10-13 10:25:07,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:25:07,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:25:07,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:25:07,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:25:07,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (1/1) ... [2020-10-13 10:25:07,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:25:07,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:25:07,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:25:07,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:25:07,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (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 [2020-10-13 10:25:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:25:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:25:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:25:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:25:07,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:25:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:25:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:25:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:25:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:25:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:25:07,567 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:25:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:25:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:25:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:25:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:25:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:25:07,568 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:25:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:25:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:25:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:25:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:25:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:25:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:25:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:25:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:25:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:25:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:25:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:25:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:25:07,571 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:25:07,572 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:25:07,573 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:25:07,573 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:25:07,573 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:25:07,573 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:25:07,573 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:25:07,573 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:25:07,574 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:25:07,574 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:25:07,574 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:25:07,574 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:25:07,574 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:25:07,574 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:25:07,575 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:25:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:25:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:25:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:25:07,579 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:25:07,580 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:25:07,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:25:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:25:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:25:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:25:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:25:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:25:07,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:25:08,076 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:25:08,076 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 10:25:08,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:25:08 BoogieIcfgContainer [2020-10-13 10:25:08,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:25:08,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:25:08,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:25:08,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:25:08,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:25:06" (1/3) ... [2020-10-13 10:25:08,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c304442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:25:08, skipping insertion in model container [2020-10-13 10:25:08,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:25:07" (2/3) ... [2020-10-13 10:25:08,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c304442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:25:08, skipping insertion in model container [2020-10-13 10:25:08,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:25:08" (3/3) ... [2020-10-13 10:25:08,097 INFO L109 eAbstractionObserver]: Analyzing ICFG cart.i [2020-10-13 10:25:08,109 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:25:08,116 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:25:08,129 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:25:08,151 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:25:08,152 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:25:08,152 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:25:08,152 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:25:08,152 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:25:08,152 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:25:08,153 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:25:08,153 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:25:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 10:25:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:25:08,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:08,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:08,178 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -823366723, now seen corresponding path program 1 times [2020-10-13 10:25:08,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:08,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289987963] [2020-10-13 10:25:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:08,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:08,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:08,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:08,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:08,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:25:08,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:25:08,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-13 10:25:08,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:25:08,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:08,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:25:08,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:08,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:08,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:08,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:08,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:08,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:25:08,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:25:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:08,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289987963] [2020-10-13 10:25:08,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:25:08,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:25:08,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406402343] [2020-10-13 10:25:08,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:25:08,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:25:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:25:08,657 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-13 10:25:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:08,796 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-10-13 10:25:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:25:08,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:25:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:08,809 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:25:08,809 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 10:25:08,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:25:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 10:25:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2020-10-13 10:25:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:25:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-10-13 10:25:08,855 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-10-13 10:25:08,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:08,856 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-10-13 10:25:08,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:25:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-10-13 10:25:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:25:08,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:08,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:08,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:25:08,858 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash -631360303, now seen corresponding path program 1 times [2020-10-13 10:25:08,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:08,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722326577] [2020-10-13 10:25:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:08,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:08,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:09,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:25:09,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:09,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-13 10:25:09,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:25:09,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:09,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:25:09,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:09,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:09,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:25:09,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:09,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:09,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:09,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722326577] [2020-10-13 10:25:09,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:25:09,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:25:09,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022696328] [2020-10-13 10:25:09,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:25:09,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:09,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:25:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:25:09,163 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2020-10-13 10:25:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:09,379 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-13 10:25:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:25:09,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 10:25:09,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:09,381 INFO L225 Difference]: With dead ends: 51 [2020-10-13 10:25:09,381 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 10:25:09,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:25:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 10:25:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-13 10:25:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:25:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-10-13 10:25:09,390 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2020-10-13 10:25:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:09,391 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-10-13 10:25:09,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:25:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-10-13 10:25:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:25:09,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:09,392 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] [2020-10-13 10:25:09,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:25:09,393 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash -585146460, now seen corresponding path program 1 times [2020-10-13 10:25:09,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:09,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947635772] [2020-10-13 10:25:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:09,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:09,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:25:09,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:09,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 10:25:09,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:25:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:25:09,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:25:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:09,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:09,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:09,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:09,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:09,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:25:09,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:09,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:09,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:25:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:25:09,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947635772] [2020-10-13 10:25:09,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:25:09,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:25:09,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861716487] [2020-10-13 10:25:09,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:25:09,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:09,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:25:09,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:25:09,541 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 4 states. [2020-10-13 10:25:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:09,627 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-13 10:25:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:25:09,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 10:25:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:09,629 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:25:09,629 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:25:09,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:25:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:25:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:25:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:25:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-13 10:25:09,643 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 24 [2020-10-13 10:25:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:09,644 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-13 10:25:09,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:25:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-13 10:25:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:25:09,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:09,646 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] [2020-10-13 10:25:09,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:25:09,647 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1394493086, now seen corresponding path program 1 times [2020-10-13 10:25:09,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:09,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790246055] [2020-10-13 10:25:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:09,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:10,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:10,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:25:10,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-13 10:25:10,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:25:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:25:10,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:25:10,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:10,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:10,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:10,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:10,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:10,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:25:10,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:10,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:10,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:10,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:25:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:25:10,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790246055] [2020-10-13 10:25:10,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:10,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:25:10,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85795184] [2020-10-13 10:25:10,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:25:10,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:10,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:25:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:25:10,326 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 8 states. [2020-10-13 10:25:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:10,562 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-13 10:25:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:25:10,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 10:25:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:10,564 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:25:10,564 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:25:10,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:25:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:25:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-10-13 10:25:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:25:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-10-13 10:25:10,572 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 24 [2020-10-13 10:25:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:10,573 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-10-13 10:25:10,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:25:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-10-13 10:25:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:25:10,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:10,574 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] [2020-10-13 10:25:10,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:25:10,575 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:10,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1879027926, now seen corresponding path program 1 times [2020-10-13 10:25:10,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:10,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182225567] [2020-10-13 10:25:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:10,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:10,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:10,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:10,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:25:10,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:10,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-13 10:25:10,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:25:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:25:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:25:10,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:11,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:11,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:11,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:11,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:25:11,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:11,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:11,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:11,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:25:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:25:11,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182225567] [2020-10-13 10:25:11,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:11,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:25:11,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085611059] [2020-10-13 10:25:11,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:25:11,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:25:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:25:11,105 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 8 states. [2020-10-13 10:25:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:11,450 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-10-13 10:25:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:25:11,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 10:25:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:11,454 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:25:11,455 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:25:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:25:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:25:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2020-10-13 10:25:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:25:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2020-10-13 10:25:11,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 27 [2020-10-13 10:25:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:11,470 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2020-10-13 10:25:11,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:25:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2020-10-13 10:25:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:25:11,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:11,473 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:11,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:25:11,474 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1163741843, now seen corresponding path program 2 times [2020-10-13 10:25:11,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:11,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664329973] [2020-10-13 10:25:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:11,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:11,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:12,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:12,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:12,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:25:12,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:25:12,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1094 [2020-10-13 10:25:12,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:12,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:25:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:12,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:25:12,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:25:12,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:12,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:12,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:12,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:12,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:12,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:12,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:12,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:12,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:12,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664329973] [2020-10-13 10:25:12,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:12,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:25:12,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939723386] [2020-10-13 10:25:12,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:25:12,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:25:12,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:25:12,747 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand 7 states. [2020-10-13 10:25:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:12,922 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-10-13 10:25:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:25:12,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:25:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:12,923 INFO L225 Difference]: With dead ends: 63 [2020-10-13 10:25:12,923 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 10:25:12,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:25:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 10:25:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 10:25:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:25:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-13 10:25:12,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 28 [2020-10-13 10:25:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:12,931 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-13 10:25:12,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:25:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-13 10:25:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:25:12,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:12,932 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:12,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:25:12,933 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2118199155, now seen corresponding path program 3 times [2020-10-13 10:25:12,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:12,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946919168] [2020-10-13 10:25:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:14,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:14,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:25:14,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:14,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-13 10:25:14,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:14,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:25:14,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:14,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:25:14,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:14,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:14,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:14,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:14,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:14,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:14,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:14,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:14,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:14,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:14,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946919168] [2020-10-13 10:25:14,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:14,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:25:14,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611016164] [2020-10-13 10:25:14,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:25:14,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:25:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:25:14,552 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 11 states. [2020-10-13 10:25:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:15,056 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-13 10:25:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:25:15,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-13 10:25:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:15,058 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:25:15,058 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:25:15,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:25:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:25:15,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-13 10:25:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:25:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-10-13 10:25:15,066 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 32 [2020-10-13 10:25:15,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:15,067 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-10-13 10:25:15,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:25:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-10-13 10:25:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:25:15,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:15,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:15,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:25:15,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1615412517, now seen corresponding path program 2 times [2020-10-13 10:25:15,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:15,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321215769] [2020-10-13 10:25:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:15,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:15,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:15,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:25:15,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:15,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-13 10:25:15,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:25:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:15,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:25:15,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:15,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:15,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:15,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:15,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:15,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:15,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:15,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:15,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321215769] [2020-10-13 10:25:15,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:15,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:25:15,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829608809] [2020-10-13 10:25:15,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:25:15,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:25:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:25:15,783 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 12 states. [2020-10-13 10:25:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:16,589 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-13 10:25:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:25:16,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-13 10:25:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:16,591 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:25:16,591 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:25:16,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:25:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:25:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-13 10:25:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:25:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-13 10:25:16,600 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 35 [2020-10-13 10:25:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:16,601 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-13 10:25:16,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:25:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-13 10:25:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:25:16,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:16,602 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:16,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:25:16,603 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:16,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:16,603 INFO L82 PathProgramCache]: Analyzing trace with hash -745884930, now seen corresponding path program 4 times [2020-10-13 10:25:16,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:16,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233586792] [2020-10-13 10:25:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:16,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:17,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:17,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:25:17,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:17,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-13 10:25:17,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:17,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:25:17,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:17,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:25:17,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:17,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:17,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:17,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:17,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:17,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:17,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:17,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:17,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:17,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:17,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:25:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:17,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233586792] [2020-10-13 10:25:17,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:17,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:25:17,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978454081] [2020-10-13 10:25:17,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:25:17,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:17,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:25:17,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:25:17,714 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 9 states. [2020-10-13 10:25:17,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:17,988 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2020-10-13 10:25:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:25:17,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:25:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:17,989 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:25:17,989 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:25:17,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:25:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:25:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 10:25:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 10:25:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2020-10-13 10:25:18,006 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 36 [2020-10-13 10:25:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:18,008 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2020-10-13 10:25:18,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:25:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2020-10-13 10:25:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:25:18,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:18,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:18,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:25:18,011 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash -350358989, now seen corresponding path program 3 times [2020-10-13 10:25:18,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:18,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964627357] [2020-10-13 10:25:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:18,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:18,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:18,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:25:18,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:18,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-13 10:25:18,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:25:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:25:18,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:19,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:19,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:19,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:19,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:19,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:19,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:19,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964627357] [2020-10-13 10:25:19,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:19,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:25:19,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857959721] [2020-10-13 10:25:19,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:25:19,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:19,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:25:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:25:19,154 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 12 states. [2020-10-13 10:25:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:19,693 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-10-13 10:25:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:25:19,694 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 10:25:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:19,695 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:25:19,695 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:25:19,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:25:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:25:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 10:25:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:25:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2020-10-13 10:25:19,703 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 38 [2020-10-13 10:25:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:19,703 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2020-10-13 10:25:19,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:25:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2020-10-13 10:25:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:25:19,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:19,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:19,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:25:19,705 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash 204586756, now seen corresponding path program 5 times [2020-10-13 10:25:19,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:19,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626301532] [2020-10-13 10:25:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:19,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:20,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:20,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:25:20,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:20,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-10-13 10:25:20,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:25:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:25:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:20,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:20,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:20,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:20,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:20,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:20,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:20,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:20,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:20,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:20,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:20,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:20,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626301532] [2020-10-13 10:25:20,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:20,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:25:20,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541028299] [2020-10-13 10:25:20,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:25:20,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:25:20,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:25:20,730 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 13 states. [2020-10-13 10:25:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:21,400 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-13 10:25:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:25:21,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-13 10:25:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:21,402 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:25:21,402 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:25:21,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:25:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:25:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-13 10:25:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 10:25:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-10-13 10:25:21,410 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 40 [2020-10-13 10:25:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:21,410 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-10-13 10:25:21,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:25:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2020-10-13 10:25:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:25:21,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:21,412 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:21,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:25:21,412 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:21,412 INFO L82 PathProgramCache]: Analyzing trace with hash 289353716, now seen corresponding path program 4 times [2020-10-13 10:25:21,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:21,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67301608] [2020-10-13 10:25:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:21,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:22,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:22,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:25:22,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:22,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-13 10:25:22,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:25:22,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:22,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:25:22,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:22,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:22,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:22,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:22,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:22,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:22,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:22,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:22,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:22,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67301608] [2020-10-13 10:25:22,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:22,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:25:22,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562950837] [2020-10-13 10:25:22,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:25:22,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:25:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:25:22,425 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand 14 states. [2020-10-13 10:25:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:23,535 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-13 10:25:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:25:23,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-13 10:25:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:23,536 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:25:23,537 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:25:23,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:25:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:25:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2020-10-13 10:25:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:25:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-10-13 10:25:23,557 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 43 [2020-10-13 10:25:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:23,557 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-10-13 10:25:23,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:25:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-10-13 10:25:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:25:23,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:23,558 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:23,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:25:23,559 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1095965199, now seen corresponding path program 6 times [2020-10-13 10:25:23,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:23,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238345473] [2020-10-13 10:25:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:23,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:24,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:24,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:25:24,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:24,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1128 [2020-10-13 10:25:24,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:25:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:25:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:25:25,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:25,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:25,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:25,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:25,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:25:25,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:25,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:25,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:25,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238345473] [2020-10-13 10:25:25,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:25,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:25:25,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789615894] [2020-10-13 10:25:25,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:25:25,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:25:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:25:25,058 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 11 states. [2020-10-13 10:25:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:25,506 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2020-10-13 10:25:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:25:25,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 10:25:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:25,508 INFO L225 Difference]: With dead ends: 103 [2020-10-13 10:25:25,508 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:25:25,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:25:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:25:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:25:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:25:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2020-10-13 10:25:25,522 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 44 [2020-10-13 10:25:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:25,524 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2020-10-13 10:25:25,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:25:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2020-10-13 10:25:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:25:25,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:25,525 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:25,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:25:25,525 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:25,525 INFO L82 PathProgramCache]: Analyzing trace with hash 141089028, now seen corresponding path program 5 times [2020-10-13 10:25:25,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:25,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655076208] [2020-10-13 10:25:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:25,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:26,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:26,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:25:26,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:26,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-13 10:25:26,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:26,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:25:26,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:26,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:25:26,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:26,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:26,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:26,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:26,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:26,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:26,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:26,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:26,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:26,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:26,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655076208] [2020-10-13 10:25:26,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:26,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:25:26,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009297036] [2020-10-13 10:25:26,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:25:26,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:26,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:25:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:25:26,676 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 15 states. [2020-10-13 10:25:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:27,846 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2020-10-13 10:25:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:25:27,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-13 10:25:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:27,848 INFO L225 Difference]: With dead ends: 93 [2020-10-13 10:25:27,848 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 10:25:27,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:25:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 10:25:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2020-10-13 10:25:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:25:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2020-10-13 10:25:27,858 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 46 [2020-10-13 10:25:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:27,859 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2020-10-13 10:25:27,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:25:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2020-10-13 10:25:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:25:27,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:27,860 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:27,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:25:27,860 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:27,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1849114603, now seen corresponding path program 7 times [2020-10-13 10:25:27,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:27,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714319040] [2020-10-13 10:25:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:29,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:29,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:25:29,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:29,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1253 [2020-10-13 10:25:29,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:29,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:25:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:29,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:25:29,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:29,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:29,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:29,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:29,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:29,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714319040] [2020-10-13 10:25:29,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:29,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:25:29,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256851459] [2020-10-13 10:25:29,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:25:29,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:25:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:25:29,632 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand 15 states. [2020-10-13 10:25:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:30,956 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-10-13 10:25:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:25:30,956 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-13 10:25:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:30,958 INFO L225 Difference]: With dead ends: 121 [2020-10-13 10:25:30,958 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:25:30,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:25:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:25:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2020-10-13 10:25:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:25:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-10-13 10:25:30,969 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 48 [2020-10-13 10:25:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:30,969 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-10-13 10:25:30,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:25:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-10-13 10:25:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 10:25:30,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:30,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:30,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:25:30,970 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:30,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:30,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1585850892, now seen corresponding path program 6 times [2020-10-13 10:25:30,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:30,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017985796] [2020-10-13 10:25:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:31,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:31,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:32,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:32,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 10:25:32,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:32,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1156 [2020-10-13 10:25:32,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:25:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:25:32,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:32,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:32,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:32,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:32,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:32,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:25:32,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:32,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:32,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:32,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017985796] [2020-10-13 10:25:32,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:32,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:25:32,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977710742] [2020-10-13 10:25:32,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:25:32,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:32,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:25:32,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:25:32,516 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 15 states. [2020-10-13 10:25:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:33,837 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-13 10:25:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:25:33,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-13 10:25:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:33,838 INFO L225 Difference]: With dead ends: 104 [2020-10-13 10:25:33,838 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 10:25:33,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:25:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 10:25:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-13 10:25:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:25:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-10-13 10:25:33,848 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 49 [2020-10-13 10:25:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:33,849 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-13 10:25:33,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:25:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-10-13 10:25:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:25:33,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:33,849 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:33,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:25:33,850 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 281299267, now seen corresponding path program 7 times [2020-10-13 10:25:33,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:33,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049190624] [2020-10-13 10:25:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:25:34,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1053 [2020-10-13 10:25:34,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:25:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 10:25:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:35,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:35,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:35,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:35,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:35,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049190624] [2020-10-13 10:25:35,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:35,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:25:35,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123329267] [2020-10-13 10:25:35,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:25:35,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:25:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:25:35,498 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 16 states. [2020-10-13 10:25:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:36,791 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-10-13 10:25:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:25:36,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-13 10:25:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:36,793 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:25:36,793 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 10:25:36,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:25:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 10:25:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-10-13 10:25:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 10:25:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2020-10-13 10:25:36,801 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 51 [2020-10-13 10:25:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:36,802 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2020-10-13 10:25:36,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:25:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2020-10-13 10:25:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 10:25:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:36,803 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:36,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:25:36,803 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 846277280, now seen corresponding path program 8 times [2020-10-13 10:25:36,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:36,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676001646] [2020-10-13 10:25:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:36,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:38,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:38,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:25:38,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:38,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-13 10:25:38,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:38,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:25:38,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:25:38,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:25:38,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:38,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:38,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:38,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:38,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:38,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:38,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:38,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:38,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:38,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676001646] [2020-10-13 10:25:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:38,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:25:38,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967236244] [2020-10-13 10:25:38,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:25:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:25:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:25:38,656 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand 13 states. [2020-10-13 10:25:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:39,315 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-10-13 10:25:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:25:39,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-13 10:25:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:39,316 INFO L225 Difference]: With dead ends: 117 [2020-10-13 10:25:39,316 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 10:25:39,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:25:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 10:25:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 10:25:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 10:25:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2020-10-13 10:25:39,333 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 52 [2020-10-13 10:25:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:39,333 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2020-10-13 10:25:39,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:25:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2020-10-13 10:25:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:25:39,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:39,335 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:39,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:25:39,335 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash 709167445, now seen corresponding path program 8 times [2020-10-13 10:25:39,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:39,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059174350] [2020-10-13 10:25:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:39,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:40,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:40,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:25:40,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:40,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-10-13 10:25:40,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:40,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:25:40,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:40,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 10:25:40,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:40,834 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-13 10:25:41,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:41,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:41,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:41,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:41,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:41,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:41,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:41,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:41,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:41,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059174350] [2020-10-13 10:25:41,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:41,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:25:41,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771546033] [2020-10-13 10:25:41,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:25:41,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:41,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:25:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:25:41,218 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 17 states. [2020-10-13 10:25:42,792 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-13 10:25:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:42,993 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2020-10-13 10:25:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:25:42,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2020-10-13 10:25:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:42,994 INFO L225 Difference]: With dead ends: 112 [2020-10-13 10:25:42,994 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:25:42,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:25:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:25:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-13 10:25:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 10:25:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2020-10-13 10:25:43,010 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 54 [2020-10-13 10:25:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:43,010 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2020-10-13 10:25:43,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:25:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2020-10-13 10:25:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:25:43,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:43,013 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:43,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:25:43,014 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 393964198, now seen corresponding path program 9 times [2020-10-13 10:25:43,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:43,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742430918] [2020-10-13 10:25:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:43,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:44,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:44,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:25:44,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:44,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-13 10:25:44,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:25:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:44,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 10:25:44,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:44,540 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-13 10:25:44,680 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-13 10:25:44,857 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-13 10:25:45,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:45,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:45,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:45,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:45,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:45,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:25:45,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:45,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:45,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:45,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:45,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742430918] [2020-10-13 10:25:45,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:45,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:25:45,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325147779] [2020-10-13 10:25:45,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:25:45,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:45,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:25:45,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:25:45,222 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand 17 states. [2020-10-13 10:25:46,123 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-13 10:25:46,374 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2020-10-13 10:25:46,594 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-10-13 10:25:46,795 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2020-10-13 10:25:47,303 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-13 10:25:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:47,494 INFO L93 Difference]: Finished difference Result 140 states and 173 transitions. [2020-10-13 10:25:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:25:47,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-10-13 10:25:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:47,496 INFO L225 Difference]: With dead ends: 140 [2020-10-13 10:25:47,496 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 10:25:47,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:25:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 10:25:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-13 10:25:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 10:25:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2020-10-13 10:25:47,510 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 56 [2020-10-13 10:25:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:47,510 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2020-10-13 10:25:47,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:25:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2020-10-13 10:25:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:25:47,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:47,511 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:47,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:25:47,511 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash -132876285, now seen corresponding path program 9 times [2020-10-13 10:25:47,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:47,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915380053] [2020-10-13 10:25:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:47,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:48,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:48,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:25:48,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:48,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 963 [2020-10-13 10:25:48,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:48,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:25:48,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:48,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:25:48,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:49,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:49,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:49,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:49,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:49,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:49,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:49,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:49,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:49,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:49,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:49,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915380053] [2020-10-13 10:25:49,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:49,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:25:49,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987930363] [2020-10-13 10:25:49,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:25:49,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:49,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:25:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:25:49,269 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand 18 states. [2020-10-13 10:25:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:51,267 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2020-10-13 10:25:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:25:51,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-13 10:25:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:51,269 INFO L225 Difference]: With dead ends: 118 [2020-10-13 10:25:51,269 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 10:25:51,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:25:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 10:25:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2020-10-13 10:25:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:25:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2020-10-13 10:25:51,283 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 57 [2020-10-13 10:25:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:51,283 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2020-10-13 10:25:51,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:25:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2020-10-13 10:25:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 10:25:51,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:51,289 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:51,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:25:51,289 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1554298606, now seen corresponding path program 10 times [2020-10-13 10:25:51,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:51,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79435395] [2020-10-13 10:25:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:51,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:52,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:52,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:25:52,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:52,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-13 10:25:52,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:25:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:52,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:25:52,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:53,121 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-10-13 10:25:53,341 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-10-13 10:25:53,628 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-13 10:25:54,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:54,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:54,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:54,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:54,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 43 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:54,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79435395] [2020-10-13 10:25:54,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:54,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:25:54,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86994380] [2020-10-13 10:25:54,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:25:54,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:25:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:25:54,037 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand 18 states. [2020-10-13 10:25:54,834 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2020-10-13 10:25:55,016 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-10-13 10:25:55,229 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-10-13 10:25:55,465 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-13 10:25:55,659 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 10:25:55,997 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-13 10:25:56,243 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-13 10:25:56,467 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-13 10:25:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:25:56,774 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2020-10-13 10:25:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:25:56,774 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-13 10:25:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:25:56,775 INFO L225 Difference]: With dead ends: 144 [2020-10-13 10:25:56,776 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:25:56,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:25:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:25:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-10-13 10:25:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:25:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2020-10-13 10:25:56,789 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 59 [2020-10-13 10:25:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:25:56,790 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2020-10-13 10:25:56,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:25:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2020-10-13 10:25:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:25:56,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:25:56,790 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:25:56,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:25:56,791 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:25:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:25:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1446339221, now seen corresponding path program 11 times [2020-10-13 10:25:56,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:25:56,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188488072] [2020-10-13 10:25:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:25:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:58,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1540 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:25:58,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:59,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:25:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:25:59,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:25:59,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:25:59,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:25:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:25:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:25:59,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:25:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:25:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:25:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:25:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:25:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 31 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:25:59,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188488072] [2020-10-13 10:25:59,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:25:59,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:25:59,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640748156] [2020-10-13 10:25:59,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:25:59,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:25:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:25:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:25:59,130 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand 18 states. [2020-10-13 10:26:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:01,100 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-10-13 10:26:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:26:01,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-13 10:26:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:01,101 INFO L225 Difference]: With dead ends: 120 [2020-10-13 10:26:01,102 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 10:26:01,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:26:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 10:26:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-13 10:26:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 10:26:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2020-10-13 10:26:01,112 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 60 [2020-10-13 10:26:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:01,112 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2020-10-13 10:26:01,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:26:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2020-10-13 10:26:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:26:01,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:01,113 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:01,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:26:01,113 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash -222681935, now seen corresponding path program 10 times [2020-10-13 10:26:01,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:01,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933737524] [2020-10-13 10:26:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:01,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:02,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:03,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:03,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 10:26:03,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:26:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-13 10:26:03,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:26:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:26:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:26:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:04,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:04,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:04,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:04,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:04,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:04,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:26:04,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:04,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:04,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:04,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933737524] [2020-10-13 10:26:04,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:04,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:26:04,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495512656] [2020-10-13 10:26:04,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:26:04,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:26:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:26:04,158 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand 15 states. [2020-10-13 10:26:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:05,630 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2020-10-13 10:26:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:26:05,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-13 10:26:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:05,632 INFO L225 Difference]: With dead ends: 154 [2020-10-13 10:26:05,632 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:26:05,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:26:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:26:05,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2020-10-13 10:26:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:26:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-10-13 10:26:05,650 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 60 [2020-10-13 10:26:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:05,650 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-10-13 10:26:05,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:26:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-10-13 10:26:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 10:26:05,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:05,651 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:05,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:26:05,651 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -63454426, now seen corresponding path program 12 times [2020-10-13 10:26:05,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:05,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880851318] [2020-10-13 10:26:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:05,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:06,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:06,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1290 [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:26:06,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:07,255 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-10-13 10:26:07,414 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-13 10:26:07,625 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-13 10:26:07,850 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-13 10:26:08,053 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-13 10:26:08,193 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 10:26:08,368 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-13 10:26:08,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:08,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:08,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:08,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:08,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:08,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:26:08,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:08,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:08,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:08,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:08,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 43 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:08,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880851318] [2020-10-13 10:26:08,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:08,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:26:08,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535995695] [2020-10-13 10:26:08,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:26:08,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:08,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:26:08,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:26:08,660 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 19 states. [2020-10-13 10:26:09,343 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-13 10:26:09,794 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-13 10:26:09,964 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-13 10:26:10,161 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-13 10:26:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:10,715 INFO L93 Difference]: Finished difference Result 136 states and 173 transitions. [2020-10-13 10:26:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:26:10,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-13 10:26:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:10,716 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:26:10,716 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:26:10,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:26:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:26:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-10-13 10:26:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 10:26:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 164 transitions. [2020-10-13 10:26:10,733 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 164 transitions. Word has length 62 [2020-10-13 10:26:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:10,733 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 164 transitions. [2020-10-13 10:26:10,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:26:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 164 transitions. [2020-10-13 10:26:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 10:26:10,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:10,734 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:10,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:26:10,735 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:10,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1021378889, now seen corresponding path program 11 times [2020-10-13 10:26:10,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:10,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813708902] [2020-10-13 10:26:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:10,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:12,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:12,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 10:26:12,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:12,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1638 [2020-10-13 10:26:12,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:26:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:12,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:26:12,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:12,910 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 10:26:13,095 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-13 10:26:13,295 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-13 10:26:13,522 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-13 10:26:13,665 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-13 10:26:14,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:26:14,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:14,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 63 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:14,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813708902] [2020-10-13 10:26:14,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:14,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:26:14,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861150295] [2020-10-13 10:26:14,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:26:14,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:26:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:26:14,048 INFO L87 Difference]: Start difference. First operand 128 states and 164 transitions. Second operand 19 states. [2020-10-13 10:26:14,863 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-13 10:26:15,145 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-13 10:26:15,482 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2020-10-13 10:26:15,802 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-10-13 10:26:16,082 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-10-13 10:26:16,300 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-13 10:26:16,497 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-13 10:26:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:16,753 INFO L93 Difference]: Finished difference Result 144 states and 183 transitions. [2020-10-13 10:26:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:26:16,754 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-13 10:26:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:16,755 INFO L225 Difference]: With dead ends: 144 [2020-10-13 10:26:16,755 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 10:26:16,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:26:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 10:26:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-10-13 10:26:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:26:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 173 transitions. [2020-10-13 10:26:16,773 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 173 transitions. Word has length 64 [2020-10-13 10:26:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:16,774 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 173 transitions. [2020-10-13 10:26:16,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:26:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 173 transitions. [2020-10-13 10:26:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 10:26:16,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:16,775 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:16,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:26:16,775 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:16,775 INFO L82 PathProgramCache]: Analyzing trace with hash -581295982, now seen corresponding path program 13 times [2020-10-13 10:26:16,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:16,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244587048] [2020-10-13 10:26:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:16,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1499 [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:26:18,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:18,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:26:18,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:18,682 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-13 10:26:18,853 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2020-10-13 10:26:19,043 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-13 10:26:19,230 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 10:26:19,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:19,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:19,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:19,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:19,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:26:19,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:19,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:19,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 35 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:19,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244587048] [2020-10-13 10:26:19,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:19,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:26:19,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944261825] [2020-10-13 10:26:19,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:26:19,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:26:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:26:19,835 INFO L87 Difference]: Start difference. First operand 134 states and 173 transitions. Second operand 20 states. [2020-10-13 10:26:20,509 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-13 10:26:20,803 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-13 10:26:21,039 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-13 10:26:21,260 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-13 10:26:21,453 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-13 10:26:21,665 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-13 10:26:22,020 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-13 10:26:22,229 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2020-10-13 10:26:22,463 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 56 [2020-10-13 10:26:22,672 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-13 10:26:22,873 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-13 10:26:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:22,959 INFO L93 Difference]: Finished difference Result 152 states and 191 transitions. [2020-10-13 10:26:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:26:22,959 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-13 10:26:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:22,960 INFO L225 Difference]: With dead ends: 152 [2020-10-13 10:26:22,960 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:26:22,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:26:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:26:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-10-13 10:26:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 10:26:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2020-10-13 10:26:22,979 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 65 [2020-10-13 10:26:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:22,980 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2020-10-13 10:26:22,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:26:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2020-10-13 10:26:22,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 10:26:22,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:22,981 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:22,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:26:22,981 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1948708705, now seen corresponding path program 14 times [2020-10-13 10:26:22,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:22,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807609115] [2020-10-13 10:26:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:23,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:26:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:24,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:26:24,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:24,923 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-13 10:26:25,137 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-13 10:26:25,420 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2020-10-13 10:26:25,615 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-13 10:26:25,846 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-10-13 10:26:25,989 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-13 10:26:26,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:26,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:26,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:26,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:26:26,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:26,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:26,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 63 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:26,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807609115] [2020-10-13 10:26:26,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:26,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:26:26,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442781787] [2020-10-13 10:26:26,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:26:26,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:26:26,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:26:26,398 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand 20 states. [2020-10-13 10:26:26,985 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-13 10:26:27,261 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-13 10:26:27,591 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2020-10-13 10:26:27,878 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-13 10:26:28,175 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2020-10-13 10:26:28,584 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 95 [2020-10-13 10:26:28,918 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2020-10-13 10:26:29,163 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-13 10:26:29,424 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-13 10:26:29,688 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2020-10-13 10:26:29,886 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 10:26:30,152 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 81 [2020-10-13 10:26:30,407 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2020-10-13 10:26:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:30,542 INFO L93 Difference]: Finished difference Result 170 states and 208 transitions. [2020-10-13 10:26:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:26:30,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-10-13 10:26:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:30,544 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:26:30,544 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 10:26:30,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:26:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 10:26:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 137. [2020-10-13 10:26:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 10:26:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2020-10-13 10:26:30,563 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 67 [2020-10-13 10:26:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:30,563 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2020-10-13 10:26:30,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:26:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2020-10-13 10:26:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:26:30,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:30,566 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:30,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:26:30,566 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash -76563546, now seen corresponding path program 15 times [2020-10-13 10:26:30,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:30,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129846766] [2020-10-13 10:26:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:30,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:32,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:32,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:26:32,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:32,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-10-13 10:26:32,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:26:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 10:26:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:32,792 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-13 10:26:33,010 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-13 10:26:33,136 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-13 10:26:33,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:33,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:33,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:33,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:33,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:33,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129846766] [2020-10-13 10:26:33,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:33,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:26:33,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184276449] [2020-10-13 10:26:33,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:26:33,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:26:33,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:26:33,760 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand 21 states. [2020-10-13 10:26:34,410 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-13 10:26:34,712 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-10-13 10:26:34,957 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-13 10:26:35,181 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-13 10:26:35,395 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-13 10:26:35,579 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-13 10:26:35,953 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-13 10:26:36,170 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-13 10:26:36,460 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 64 [2020-10-13 10:26:36,659 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-13 10:26:36,873 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 10:26:37,058 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-13 10:26:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:37,108 INFO L93 Difference]: Finished difference Result 153 states and 191 transitions. [2020-10-13 10:26:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:26:37,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-13 10:26:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:37,110 INFO L225 Difference]: With dead ends: 153 [2020-10-13 10:26:37,110 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 10:26:37,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:26:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 10:26:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2020-10-13 10:26:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:26:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2020-10-13 10:26:37,122 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 68 [2020-10-13 10:26:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:37,123 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2020-10-13 10:26:37,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:26:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2020-10-13 10:26:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 10:26:37,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:37,124 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:37,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:26:37,124 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:37,125 INFO L82 PathProgramCache]: Analyzing trace with hash 996362306, now seen corresponding path program 12 times [2020-10-13 10:26:37,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:37,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101771822] [2020-10-13 10:26:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:38,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:39,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:39,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:26:39,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:26:39,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2114 [2020-10-13 10:26:39,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:26:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:26:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:26:39,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:39,911 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-13 10:26:40,111 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-13 10:26:40,328 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-13 10:26:40,480 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 10:26:40,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:40,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 26 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:40,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101771822] [2020-10-13 10:26:40,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:40,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:26:40,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115165279] [2020-10-13 10:26:40,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:26:40,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:26:40,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:26:40,912 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand 17 states. [2020-10-13 10:26:41,656 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:26:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:42,230 INFO L93 Difference]: Finished difference Result 156 states and 205 transitions. [2020-10-13 10:26:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:26:42,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-13 10:26:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:42,232 INFO L225 Difference]: With dead ends: 156 [2020-10-13 10:26:42,232 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 10:26:42,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:26:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 10:26:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-10-13 10:26:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:26:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 176 transitions. [2020-10-13 10:26:42,250 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 176 transitions. Word has length 68 [2020-10-13 10:26:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:42,250 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 176 transitions. [2020-10-13 10:26:42,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:26:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 176 transitions. [2020-10-13 10:26:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 10:26:42,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:42,251 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:42,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:26:42,251 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:42,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1088010633, now seen corresponding path program 16 times [2020-10-13 10:26:42,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:42,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767277191] [2020-10-13 10:26:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:44,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:44,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 10:26:44,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:44,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1875 [2020-10-13 10:26:44,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:26:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:44,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:26:44,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:44,641 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-10-13 10:26:44,920 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-13 10:26:45,179 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-10-13 10:26:45,462 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2020-10-13 10:26:45,662 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-13 10:26:45,849 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-13 10:26:46,067 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-13 10:26:46,288 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-13 10:26:46,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:46,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 51 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:46,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767277191] [2020-10-13 10:26:46,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:46,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:26:46,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085609463] [2020-10-13 10:26:46,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:26:46,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:26:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:26:46,689 INFO L87 Difference]: Start difference. First operand 134 states and 176 transitions. Second operand 21 states. [2020-10-13 10:26:47,387 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-13 10:26:47,616 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-13 10:26:48,000 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-10-13 10:26:48,318 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-10-13 10:26:48,574 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2020-10-13 10:26:48,911 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2020-10-13 10:26:49,219 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2020-10-13 10:26:49,449 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 10:26:49,708 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 77 [2020-10-13 10:26:50,066 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2020-10-13 10:26:50,419 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 73 [2020-10-13 10:26:50,756 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2020-10-13 10:26:51,245 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 10:26:51,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:26:51,248 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2020-10-13 10:26:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:26:51,248 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-13 10:26:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:26:51,249 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:26:51,249 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 10:26:51,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:26:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 10:26:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2020-10-13 10:26:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 10:26:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 176 transitions. [2020-10-13 10:26:51,267 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 176 transitions. Word has length 70 [2020-10-13 10:26:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:26:51,267 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 176 transitions. [2020-10-13 10:26:51,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:26:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 176 transitions. [2020-10-13 10:26:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:26:51,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:26:51,269 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:26:51,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:26:51,269 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:26:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:26:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash 669563976, now seen corresponding path program 13 times [2020-10-13 10:26:51,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:26:51,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272538399] [2020-10-13 10:26:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:26:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:51,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:53,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2360 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 10:26:53,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:54,254 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 10:26:54,450 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-13 10:26:54,664 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-13 10:26:54,910 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2020-10-13 10:26:55,108 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-13 10:26:55,258 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-13 10:26:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:26:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:26:55,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:26:55,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:26:55,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:26:55,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:26:55,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:26:55,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:26:55,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:26:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:26:55,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:26:55,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:26:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 87 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:26:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272538399] [2020-10-13 10:26:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:26:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:26:55,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289809698] [2020-10-13 10:26:55,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:26:55,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:26:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:26:55,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:26:55,735 INFO L87 Difference]: Start difference. First operand 134 states and 176 transitions. Second operand 21 states. [2020-10-13 10:26:56,837 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-13 10:26:57,187 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-10-13 10:26:57,570 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 98 [2020-10-13 10:26:58,055 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 114 [2020-10-13 10:26:58,529 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 105 [2020-10-13 10:26:58,877 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2020-10-13 10:26:59,178 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-10-13 10:26:59,473 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-13 10:26:59,765 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-13 10:27:00,045 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2020-10-13 10:27:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:27:00,352 INFO L93 Difference]: Finished difference Result 200 states and 245 transitions. [2020-10-13 10:27:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:27:00,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-10-13 10:27:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:27:00,354 INFO L225 Difference]: With dead ends: 200 [2020-10-13 10:27:00,354 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 10:27:00,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:27:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 10:27:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2020-10-13 10:27:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 10:27:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-10-13 10:27:00,375 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 72 [2020-10-13 10:27:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:27:00,376 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-10-13 10:27:00,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:27:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-10-13 10:27:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 10:27:00,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:27:00,377 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:27:00,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:27:00,377 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:27:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:27:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1197313953, now seen corresponding path program 17 times [2020-10-13 10:27:00,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:27:00,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716405692] [2020-10-13 10:27:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:27:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:00,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:02,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:02,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 10:27:02,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:02,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2078 [2020-10-13 10:27:02,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:02,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:27:02,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:27:02,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:27:02,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:03,012 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-13 10:27:03,184 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-13 10:27:03,383 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-13 10:27:03,682 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-13 10:27:03,917 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-13 10:27:04,077 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-13 10:27:04,232 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-13 10:27:04,405 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-13 10:27:04,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:27:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:04,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:27:04,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 51 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:27:04,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716405692] [2020-10-13 10:27:04,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:27:04,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:27:04,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196502971] [2020-10-13 10:27:04,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:27:04,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:27:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:27:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:27:04,840 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 22 states. [2020-10-13 10:27:05,546 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 10:27:05,757 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-13 10:27:06,124 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-10-13 10:27:06,395 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 64 [2020-10-13 10:27:06,669 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-10-13 10:27:06,916 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-13 10:27:07,206 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2020-10-13 10:27:07,450 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 10:27:07,686 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2020-10-13 10:27:08,090 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2020-10-13 10:27:08,245 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-13 10:27:08,490 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 71 [2020-10-13 10:27:08,637 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-13 10:27:08,924 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2020-10-13 10:27:09,083 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-13 10:27:09,319 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 70 [2020-10-13 10:27:09,510 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-13 10:27:09,673 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 10:27:09,907 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-13 10:27:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:27:09,910 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2020-10-13 10:27:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:27:09,911 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-10-13 10:27:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:27:09,912 INFO L225 Difference]: With dead ends: 172 [2020-10-13 10:27:09,912 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:27:09,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=322, Invalid=1484, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 10:27:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:27:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 140. [2020-10-13 10:27:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 10:27:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-10-13 10:27:09,935 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 73 [2020-10-13 10:27:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:27:09,936 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-10-13 10:27:09,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:27:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-10-13 10:27:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:27:09,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:27:09,937 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:27:09,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:27:09,937 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:27:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:27:09,938 INFO L82 PathProgramCache]: Analyzing trace with hash 768745036, now seen corresponding path program 18 times [2020-10-13 10:27:09,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:27:09,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746133303] [2020-10-13 10:27:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:27:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:10,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:10,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:12,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:13,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:13,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:27:13,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:27:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3621 [2020-10-13 10:27:13,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:27:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:27:13,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 10:27:13,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:14,170 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-13 10:27:14,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:27:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:14,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:14,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:14,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:27:14,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:27:14,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:27:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:27:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:27:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 10:27:14,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746133303] [2020-10-13 10:27:14,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:27:14,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:27:14,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637554306] [2020-10-13 10:27:14,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:27:14,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:27:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:27:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:27:14,538 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 15 states. [2020-10-13 10:27:15,254 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-13 10:27:15,638 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 104 [2020-10-13 10:27:16,025 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2020-10-13 10:27:16,315 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-10-13 10:27:16,583 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-13 10:27:16,817 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-13 10:27:17,037 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-13 10:27:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:27:17,163 INFO L93 Difference]: Finished difference Result 163 states and 208 transitions. [2020-10-13 10:27:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:27:17,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-13 10:27:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:27:17,165 INFO L225 Difference]: With dead ends: 163 [2020-10-13 10:27:17,165 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:27:17,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:27:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:27:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2020-10-13 10:27:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:27:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2020-10-13 10:27:17,194 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 75 [2020-10-13 10:27:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:27:17,194 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2020-10-13 10:27:17,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:27:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2020-10-13 10:27:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:27:17,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:27:17,195 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:27:17,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:27:17,196 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:27:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:27:17,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1156185136, now seen corresponding path program 19 times [2020-10-13 10:27:17,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:27:17,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549518140] [2020-10-13 10:27:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:27:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:17,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:19,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:19,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 10:27:19,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2711 [2020-10-13 10:27:19,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:27:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:27:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 10:27:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:20,415 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-10-13 10:27:20,682 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-13 10:27:21,084 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 64 [2020-10-13 10:27:21,507 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2020-10-13 10:27:21,954 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2020-10-13 10:27:22,348 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-13 10:27:22,848 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 82 [2020-10-13 10:27:23,125 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2020-10-13 10:27:23,300 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-13 10:27:23,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:27:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:23,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:23,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:23,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:27:23,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:23,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:27:23,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:27:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:27:23,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:27:23,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 71 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:27:23,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549518140] [2020-10-13 10:27:23,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:27:23,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:27:23,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646481835] [2020-10-13 10:27:23,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:27:23,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:27:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:27:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:27:23,763 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand 22 states. [2020-10-13 10:27:24,282 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-13 10:27:24,592 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-13 10:27:24,951 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2020-10-13 10:27:25,377 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 84 [2020-10-13 10:27:25,707 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2020-10-13 10:27:26,115 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 88 [2020-10-13 10:27:26,679 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 108 [2020-10-13 10:27:27,160 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2020-10-13 10:27:27,528 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 90 [2020-10-13 10:27:27,855 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 81 [2020-10-13 10:27:28,191 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-13 10:27:28,560 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 90 [2020-10-13 10:27:28,949 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 86 [2020-10-13 10:27:29,334 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 89 [2020-10-13 10:27:29,886 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-13 10:27:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:27:29,889 INFO L93 Difference]: Finished difference Result 182 states and 225 transitions. [2020-10-13 10:27:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:27:29,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-10-13 10:27:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:27:29,890 INFO L225 Difference]: With dead ends: 182 [2020-10-13 10:27:29,890 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 10:27:29,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=336, Invalid=1304, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:27:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 10:27:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 136. [2020-10-13 10:27:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:27:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2020-10-13 10:27:29,918 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 75 [2020-10-13 10:27:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:27:29,918 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2020-10-13 10:27:29,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:27:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2020-10-13 10:27:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:27:29,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:27:29,919 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:27:29,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:27:29,919 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:27:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:27:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash -519520713, now seen corresponding path program 20 times [2020-10-13 10:27:29,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:27:29,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094557326] [2020-10-13 10:27:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:27:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:32,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:32,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:27:32,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:32,467 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-13 10:27:32,745 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-13 10:27:33,109 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 44 [2020-10-13 10:27:33,540 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2020-10-13 10:27:33,844 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 57 [2020-10-13 10:27:34,065 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-13 10:27:34,204 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-13 10:27:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:27:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:27:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:27:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 51 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:27:34,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094557326] [2020-10-13 10:27:34,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:27:34,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:27:34,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481931009] [2020-10-13 10:27:34,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:27:34,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:27:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:27:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:27:34,867 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand 23 states. [2020-10-13 10:27:35,697 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-13 10:27:35,937 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-13 10:27:36,370 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 71 [2020-10-13 10:27:36,729 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-10-13 10:27:37,052 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 62 [2020-10-13 10:27:37,356 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2020-10-13 10:27:37,634 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2020-10-13 10:27:37,986 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-13 10:27:38,270 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-13 10:27:38,555 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2020-10-13 10:27:38,892 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-13 10:27:39,234 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2020-10-13 10:27:39,557 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 71 [2020-10-13 10:27:39,841 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 67 [2020-10-13 10:27:40,103 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 70 [2020-10-13 10:27:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:27:40,206 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-10-13 10:27:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:27:40,207 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-10-13 10:27:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:27:40,208 INFO L225 Difference]: With dead ends: 157 [2020-10-13 10:27:40,208 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 10:27:40,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:27:40,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 10:27:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2020-10-13 10:27:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:27:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2020-10-13 10:27:40,237 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 76 [2020-10-13 10:27:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:27:40,238 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2020-10-13 10:27:40,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:27:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2020-10-13 10:27:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 10:27:40,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:27:40,239 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:27:40,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:27:40,239 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:27:40,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:27:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2097031853, now seen corresponding path program 14 times [2020-10-13 10:27:40,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:27:40,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018423708] [2020-10-13 10:27:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:27:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:40,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:41,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:43,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:43,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3256 [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:27:43,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:44,230 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-13 10:27:44,540 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-10-13 10:27:44,847 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2020-10-13 10:27:45,175 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2020-10-13 10:27:45,395 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-13 10:27:45,556 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-13 10:27:45,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:27:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:45,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:27:45,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:27:46,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018423708] [2020-10-13 10:27:46,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:27:46,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:27:46,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840757821] [2020-10-13 10:27:46,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:27:46,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:27:46,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:27:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:27:46,035 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand 19 states. [2020-10-13 10:27:46,901 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 10:27:47,401 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-13 10:27:47,654 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:27:48,118 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-13 10:27:48,424 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-13 10:27:48,749 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-13 10:27:49,033 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-13 10:27:49,450 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 10:27:49,806 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-13 10:27:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:27:50,162 INFO L93 Difference]: Finished difference Result 203 states and 270 transitions. [2020-10-13 10:27:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:27:50,162 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-13 10:27:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:27:50,164 INFO L225 Difference]: With dead ends: 203 [2020-10-13 10:27:50,164 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 10:27:50,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:27:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 10:27:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-13 10:27:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 10:27:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 241 transitions. [2020-10-13 10:27:50,197 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 241 transitions. Word has length 76 [2020-10-13 10:27:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:27:50,197 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 241 transitions. [2020-10-13 10:27:50,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:27:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 241 transitions. [2020-10-13 10:27:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:27:50,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:27:50,198 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:27:50,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:27:50,198 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:27:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:27:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1722428600, now seen corresponding path program 21 times [2020-10-13 10:27:50,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:27:50,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044648097] [2020-10-13 10:27:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:27:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:50,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:52,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:52,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 10:27:52,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2498 [2020-10-13 10:27:52,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:27:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:27:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 10:27:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:53,500 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-13 10:27:53,919 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-10-13 10:27:54,340 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 50 [2020-10-13 10:27:54,848 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 56 [2020-10-13 10:27:55,298 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 65 [2020-10-13 10:27:55,650 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-10-13 10:27:56,041 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-10-13 10:27:56,243 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 10:27:56,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:27:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:27:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:27:56,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:27:56,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:27:56,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:27:56,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:27:56,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:27:56,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:27:56,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:27:56,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:27:56,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:27:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 87 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:27:56,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044648097] [2020-10-13 10:27:56,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:27:56,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:27:56,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433933477] [2020-10-13 10:27:56,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:27:56,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:27:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:27:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:27:56,833 INFO L87 Difference]: Start difference. First operand 181 states and 241 transitions. Second operand 23 states. [2020-10-13 10:27:57,595 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-13 10:27:57,945 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-13 10:27:58,460 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 74 [2020-10-13 10:27:58,850 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-10-13 10:27:59,212 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 87 [2020-10-13 10:27:59,714 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 98 [2020-10-13 10:28:00,136 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2020-10-13 10:28:00,458 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-13 10:28:00,852 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-10-13 10:28:01,235 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-10-13 10:28:01,696 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 81 [2020-10-13 10:28:02,124 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 85 [2020-10-13 10:28:02,546 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 88 [2020-10-13 10:28:03,125 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-13 10:28:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:03,128 INFO L93 Difference]: Finished difference Result 228 states and 288 transitions. [2020-10-13 10:28:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:28:03,128 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2020-10-13 10:28:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:03,130 INFO L225 Difference]: With dead ends: 228 [2020-10-13 10:28:03,130 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 10:28:03,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:28:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 10:28:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 181. [2020-10-13 10:28:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 10:28:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 241 transitions. [2020-10-13 10:28:03,155 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 241 transitions. Word has length 78 [2020-10-13 10:28:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:03,155 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 241 transitions. [2020-10-13 10:28:03,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:28:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 241 transitions. [2020-10-13 10:28:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 10:28:03,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:03,156 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:03,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:28:03,157 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2024472545, now seen corresponding path program 22 times [2020-10-13 10:28:03,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:03,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859295602] [2020-10-13 10:28:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:03,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:05,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:05,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 10:28:05,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:05,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-10-13 10:28:05,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:28:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:28:05,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:28:05,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:05,980 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-13 10:28:06,195 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-13 10:28:06,561 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-10-13 10:28:07,026 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2020-10-13 10:28:07,550 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-13 10:28:07,950 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-10-13 10:28:08,277 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-13 10:28:08,527 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-13 10:28:08,686 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-13 10:28:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:09,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:09,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:09,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:09,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:09,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:09,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:09,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:09,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 63 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:09,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859295602] [2020-10-13 10:28:09,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:09,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:28:09,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272657283] [2020-10-13 10:28:09,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:28:09,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:09,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:28:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:28:09,250 INFO L87 Difference]: Start difference. First operand 181 states and 241 transitions. Second operand 24 states. [2020-10-13 10:28:10,007 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-13 10:28:10,231 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-13 10:28:10,674 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-10-13 10:28:11,001 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2020-10-13 10:28:11,325 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-13 10:28:11,729 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-10-13 10:28:12,169 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-13 10:28:12,439 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-13 10:28:12,697 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-13 10:28:12,971 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-13 10:28:13,297 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 80 [2020-10-13 10:28:13,714 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 76 [2020-10-13 10:28:14,012 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-13 10:28:14,280 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-10-13 10:28:14,555 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-13 10:28:14,818 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-13 10:28:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:14,882 INFO L93 Difference]: Finished difference Result 200 states and 260 transitions. [2020-10-13 10:28:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:28:14,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-13 10:28:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:14,885 INFO L225 Difference]: With dead ends: 200 [2020-10-13 10:28:14,885 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 10:28:14,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:28:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 10:28:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 184. [2020-10-13 10:28:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:28:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 244 transitions. [2020-10-13 10:28:14,926 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 244 transitions. Word has length 79 [2020-10-13 10:28:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:14,927 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 244 transitions. [2020-10-13 10:28:14,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:28:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 244 transitions. [2020-10-13 10:28:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 10:28:14,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:14,928 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:14,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:28:14,928 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1771183271, now seen corresponding path program 15 times [2020-10-13 10:28:14,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:14,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517749895] [2020-10-13 10:28:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:15,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:18,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:18,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:28:18,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:18,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3124 [2020-10-13 10:28:18,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:28:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:28:18,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 10:28:18,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:18,740 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 10:28:19,035 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-13 10:28:19,428 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-13 10:28:19,807 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 56 [2020-10-13 10:28:20,276 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2020-10-13 10:28:20,774 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 71 [2020-10-13 10:28:21,218 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2020-10-13 10:28:21,509 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-13 10:28:21,783 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-13 10:28:22,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:22,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:22,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:22,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:22,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:22,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:22,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:22,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:22,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:22,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:22,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 115 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:22,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517749895] [2020-10-13 10:28:22,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:22,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:28:22,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564570793] [2020-10-13 10:28:22,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:28:22,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:22,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:28:22,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:28:22,267 INFO L87 Difference]: Start difference. First operand 184 states and 244 transitions. Second operand 23 states. [2020-10-13 10:28:24,179 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-10-13 10:28:24,688 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 104 [2020-10-13 10:28:25,276 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 111 [2020-10-13 10:28:26,068 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 141 [2020-10-13 10:28:26,802 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 132 [2020-10-13 10:28:27,425 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 123 [2020-10-13 10:28:27,943 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-10-13 10:28:28,462 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 104 [2020-10-13 10:28:28,898 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2020-10-13 10:28:29,425 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 107 [2020-10-13 10:28:30,115 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-13 10:28:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:30,135 INFO L93 Difference]: Finished difference Result 243 states and 306 transitions. [2020-10-13 10:28:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:28:30,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2020-10-13 10:28:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:30,137 INFO L225 Difference]: With dead ends: 243 [2020-10-13 10:28:30,137 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 10:28:30,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 10:28:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 10:28:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 190. [2020-10-13 10:28:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 10:28:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 253 transitions. [2020-10-13 10:28:30,178 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 253 transitions. Word has length 80 [2020-10-13 10:28:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:30,178 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 253 transitions. [2020-10-13 10:28:30,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:28:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 253 transitions. [2020-10-13 10:28:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:28:30,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:30,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:30,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:28:30,179 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -892238544, now seen corresponding path program 23 times [2020-10-13 10:28:30,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:30,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054329365] [2020-10-13 10:28:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:30,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:33,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2833 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:28:33,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:33,556 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-13 10:28:33,910 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-13 10:28:34,468 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2020-10-13 10:28:35,091 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-10-13 10:28:35,825 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2020-10-13 10:28:36,390 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-10-13 10:28:36,739 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2020-10-13 10:28:37,039 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-13 10:28:37,383 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-10-13 10:28:37,600 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-13 10:28:38,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:38,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:38,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:38,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 87 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:38,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054329365] [2020-10-13 10:28:38,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:38,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:28:38,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298198952] [2020-10-13 10:28:38,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:28:38,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:38,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:28:38,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:28:38,097 INFO L87 Difference]: Start difference. First operand 190 states and 253 transitions. Second operand 24 states. [2020-10-13 10:28:39,055 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-13 10:28:39,468 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-13 10:28:39,999 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2020-10-13 10:28:40,462 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 78 [2020-10-13 10:28:40,909 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 74 [2020-10-13 10:28:41,315 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2020-10-13 10:28:41,795 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 93 [2020-10-13 10:28:42,206 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2020-10-13 10:28:42,582 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-10-13 10:28:42,969 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2020-10-13 10:28:43,444 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 87 [2020-10-13 10:28:43,976 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 87 [2020-10-13 10:28:44,536 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2020-10-13 10:28:45,020 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 86 [2020-10-13 10:28:45,649 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-13 10:28:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:45,653 INFO L93 Difference]: Finished difference Result 238 states and 301 transitions. [2020-10-13 10:28:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:28:45,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2020-10-13 10:28:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:45,655 INFO L225 Difference]: With dead ends: 238 [2020-10-13 10:28:45,655 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 10:28:45,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 10:28:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 10:28:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 190. [2020-10-13 10:28:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 10:28:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 253 transitions. [2020-10-13 10:28:45,701 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 253 transitions. Word has length 81 [2020-10-13 10:28:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:45,701 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 253 transitions. [2020-10-13 10:28:45,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:28:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 253 transitions. [2020-10-13 10:28:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 10:28:45,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:45,702 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:45,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:28:45,703 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:45,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1134716407, now seen corresponding path program 24 times [2020-10-13 10:28:45,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:45,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201887677] [2020-10-13 10:28:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:45,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:48,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:48,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 10:28:48,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:28:48,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3176 [2020-10-13 10:28:48,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:28:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:28:48,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:28:48,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:49,397 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 10:28:49,551 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-13 10:28:49,722 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-13 10:28:49,887 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 10:28:50,059 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-13 10:28:50,188 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 10:28:50,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:28:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:50,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:28:50,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:28:50,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:28:50,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:28:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:28:50,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:28:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:28:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:28:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:28:50,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:28:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 69 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:28:50,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201887677] [2020-10-13 10:28:50,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:28:50,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:28:50,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494577744] [2020-10-13 10:28:50,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:28:50,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:28:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:28:50,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:28:50,857 INFO L87 Difference]: Start difference. First operand 190 states and 253 transitions. Second operand 24 states. [2020-10-13 10:28:51,590 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-13 10:28:51,836 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-10-13 10:28:52,245 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-13 10:28:52,595 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-13 10:28:52,930 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-13 10:28:53,250 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2020-10-13 10:28:53,570 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-13 10:28:53,858 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 10:28:54,123 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-13 10:28:54,402 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-13 10:28:54,677 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-13 10:28:55,090 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2020-10-13 10:28:55,457 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 69 [2020-10-13 10:28:55,752 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2020-10-13 10:28:56,046 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-10-13 10:28:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:28:56,121 INFO L93 Difference]: Finished difference Result 208 states and 271 transitions. [2020-10-13 10:28:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:28:56,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-10-13 10:28:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:28:56,123 INFO L225 Difference]: With dead ends: 208 [2020-10-13 10:28:56,123 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:28:56,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:28:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:28:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-13 10:28:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 10:28:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 198 transitions. [2020-10-13 10:28:56,163 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 198 transitions. Word has length 82 [2020-10-13 10:28:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:28:56,164 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 198 transitions. [2020-10-13 10:28:56,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:28:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 198 transitions. [2020-10-13 10:28:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 10:28:56,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:28:56,165 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:28:56,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:28:56,165 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:28:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:28:56,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1643696257, now seen corresponding path program 25 times [2020-10-13 10:28:56,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:28:56,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878280330] [2020-10-13 10:28:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:28:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:28:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking...