/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=BIGGEST --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/running_example.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:38:51,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:38:51,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:38:51,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:38:51,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:38:51,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:38:51,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:38:51,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:38:51,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:38:51,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:38:51,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:38:51,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:38:51,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:38:51,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:38:51,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:38:51,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:38:51,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:38:51,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:38:51,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:38:51,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:38:51,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:38:51,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:38:51,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:38:51,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:38:51,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:38:51,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:38:51,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:38:51,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:38:51,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:38:51,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:38:51,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:38:51,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:38:51,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:38:51,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:38:51,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:38:51,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:38:51,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:38:51,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:38:51,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:38:51,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:38:51,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:38:51,331 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 [2020-10-12 15:38:51,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:38:51,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:38:51,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:38:51,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:38:51,357 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:38:51,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:38:51,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:38:51,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:38:51,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:38:51,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:38:51,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:38:51,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:38:51,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:38:51,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:38:51,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:38:51,359 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:38:51,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:38:51,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:38:51,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:38:51,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:38:51,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:38:51,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:38:51,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:38:51,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:38:51,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:38:51,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:38:51,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:38:51,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:38:51,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:38:51,362 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:38:51,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:38:51,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:38:51,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:38:51,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:38:51,721 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:38:51,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/running_example.i [2020-10-12 15:38:51,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ea4e2009/f00aca8507a2497bb0f7fdd831a57e86/FLAGb16df0a9b [2020-10-12 15:38:52,384 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:38:52,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-data/running_example.i [2020-10-12 15:38:52,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ea4e2009/f00aca8507a2497bb0f7fdd831a57e86/FLAGb16df0a9b [2020-10-12 15:38:52,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ea4e2009/f00aca8507a2497bb0f7fdd831a57e86 [2020-10-12 15:38:52,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:38:52,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:38:52,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:52,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:38:52,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:38:52,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:52" (1/1) ... [2020-10-12 15:38:52,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f93aad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:52, skipping insertion in model container [2020-10-12 15:38:52,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:38:52" (1/1) ... [2020-10-12 15:38:52,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:38:52,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:38:53,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:53,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:38:53,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:38:53,207 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:38:53,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53 WrapperNode [2020-10-12 15:38:53,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:38:53,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:38:53,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:38:53,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:38:53,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (1/1) ... [2020-10-12 15:38:53,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:38:53,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:38:53,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:38:53,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:38:53,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (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 [2020-10-12 15:38:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:38:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:38:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:38:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:38:53,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:38:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:38:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:38:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:38:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:38:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:38:53,350 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:38:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:38:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:38:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:38:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:38:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:38:53,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:38:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:38:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:38:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:38:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:38:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:38:53,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:38:53,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:38:53,354 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:38:53,355 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:38:53,356 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:38:53,356 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:38:53,356 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:38:53,356 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:38:53,356 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:38:53,356 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:38:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:38:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:38:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:38:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:38:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:38:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:38:53,358 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:38:53,359 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:38:53,360 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:38:53,361 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:38:53,362 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:38:53,363 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:38:53,364 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:38:53,365 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:38:53,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:38:53,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:38:53,875 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:38:53,875 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 15:38:53,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:53 BoogieIcfgContainer [2020-10-12 15:38:53,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:38:53,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:38:53,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:38:53,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:38:53,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:38:52" (1/3) ... [2020-10-12 15:38:53,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109ce91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:53, skipping insertion in model container [2020-10-12 15:38:53,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:38:53" (2/3) ... [2020-10-12 15:38:53,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109ce91d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:38:53, skipping insertion in model container [2020-10-12 15:38:53,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:38:53" (3/3) ... [2020-10-12 15:38:53,889 INFO L109 eAbstractionObserver]: Analyzing ICFG running_example.i [2020-10-12 15:38:53,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:38:53,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:38:53,916 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:38:53,943 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:38:53,943 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:38:53,943 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:38:53,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:38:53,944 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:38:53,944 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:38:53,945 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:38:53,945 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:38:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-12 15:38:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 15:38:53,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:53,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:53,971 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:53,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1790475303, now seen corresponding path program 1 times [2020-10-12 15:38:53,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:53,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451189024] [2020-10-12 15:38:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:54,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:54,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:38:54,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:54,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-12 15:38:54,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:54,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:38:54,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:54,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 15:38:54,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:38:54,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:54,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:54,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:54,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 15:38:54,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:54,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:54,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451189024] [2020-10-12 15:38:54,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:38:54,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:38:54,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610022578] [2020-10-12 15:38:54,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:38:54,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:54,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:38:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:38:54,632 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-10-12 15:38:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:54,801 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2020-10-12 15:38:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:38:54,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-12 15:38:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:54,817 INFO L225 Difference]: With dead ends: 43 [2020-10-12 15:38:54,817 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 15:38:54,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 15:38:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-12 15:38:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 15:38:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-12 15:38:54,867 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 12 [2020-10-12 15:38:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:54,867 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-12 15:38:54,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:38:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-12 15:38:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:38:54,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:54,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:54,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:38:54,870 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:54,870 INFO L82 PathProgramCache]: Analyzing trace with hash 147079127, now seen corresponding path program 1 times [2020-10-12 15:38:54,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:54,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665388391] [2020-10-12 15:38:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:54,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:55,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:38:55,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-12 15:38:55,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:55,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:38:55,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:55,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:55,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:55,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:55,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:55,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:55,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:55,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:55,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:55,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665388391] [2020-10-12 15:38:55,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:55,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 15:38:55,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872632274] [2020-10-12 15:38:55,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:38:55,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:38:55,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:38:55,280 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 7 states. [2020-10-12 15:38:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:55,497 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2020-10-12 15:38:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:38:55,497 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 15:38:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:55,499 INFO L225 Difference]: With dead ends: 50 [2020-10-12 15:38:55,499 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 15:38:55,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 15:38:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-10-12 15:38:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:38:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-12 15:38:55,509 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2020-10-12 15:38:55,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:55,509 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-12 15:38:55,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:38:55,510 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-12 15:38:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 15:38:55,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:55,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:55,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:38:55,511 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash 470360634, now seen corresponding path program 1 times [2020-10-12 15:38:55,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:55,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762991888] [2020-10-12 15:38:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:55,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:38:55,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:55,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-12 15:38:55,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:38:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:55,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:38:55,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:55,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:55,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:55,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:55,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:55,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:55,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:55,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:55,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:55,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:55,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:55,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:55,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762991888] [2020-10-12 15:38:55,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:55,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:38:55,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604204363] [2020-10-12 15:38:55,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:38:55,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:55,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:38:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:38:55,782 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 6 states. [2020-10-12 15:38:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:56,016 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-10-12 15:38:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:38:56,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 15:38:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:56,020 INFO L225 Difference]: With dead ends: 51 [2020-10-12 15:38:56,020 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:38:56,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:38:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-12 15:38:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 15:38:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-10-12 15:38:56,034 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 20 [2020-10-12 15:38:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:56,035 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-10-12 15:38:56,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:38:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-10-12 15:38:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:56,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:56,037 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:56,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:38:56,038 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash 977312820, now seen corresponding path program 1 times [2020-10-12 15:38:56,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:56,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338609387] [2020-10-12 15:38:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:56,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:56,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:56,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-12 15:38:56,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:38:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:38:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:38:56,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:56,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:56,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:56,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:56,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:56,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:56,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:56,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:56,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338609387] [2020-10-12 15:38:56,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:56,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:38:56,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516186932] [2020-10-12 15:38:56,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:38:56,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:38:56,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:38:56,546 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 9 states. [2020-10-12 15:38:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:56,817 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-10-12 15:38:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:38:56,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 15:38:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:56,820 INFO L225 Difference]: With dead ends: 73 [2020-10-12 15:38:56,820 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 15:38:56,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:38:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 15:38:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-10-12 15:38:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:38:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2020-10-12 15:38:56,843 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 22 [2020-10-12 15:38:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:56,844 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2020-10-12 15:38:56,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:38:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2020-10-12 15:38:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:56,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:56,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:56,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:38:56,848 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash 977314742, now seen corresponding path program 1 times [2020-10-12 15:38:56,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:56,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206364032] [2020-10-12 15:38:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:56,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:56,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:57,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:57,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:38:57,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 15:38:57,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:57,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:38:57,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:38:57,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:57,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:57,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:57,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:57,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:57,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:57,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:57,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:57,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:57,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:38:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:57,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206364032] [2020-10-12 15:38:57,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:57,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:38:57,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319342994] [2020-10-12 15:38:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:57,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:57,236 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand 8 states. [2020-10-12 15:38:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:57,471 INFO L93 Difference]: Finished difference Result 112 states and 155 transitions. [2020-10-12 15:38:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:38:57,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 15:38:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:57,473 INFO L225 Difference]: With dead ends: 112 [2020-10-12 15:38:57,473 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:38:57,474 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 [2020-10-12 15:38:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:38:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2020-10-12 15:38:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:38:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2020-10-12 15:38:57,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 22 [2020-10-12 15:38:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:57,486 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2020-10-12 15:38:57,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2020-10-12 15:38:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:57,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:57,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:57,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:38:57,488 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 167966194, now seen corresponding path program 1 times [2020-10-12 15:38:57,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:57,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852058424] [2020-10-12 15:38:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:57,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:57,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:57,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:38:57,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-12 15:38:57,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:38:57,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:38:57,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:57,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:57,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:57,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:57,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:57,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:38:57,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:57,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:57,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852058424] [2020-10-12 15:38:57,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:57,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:38:57,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002789201] [2020-10-12 15:38:57,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:57,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:57,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:57,926 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand 8 states. [2020-10-12 15:38:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:58,353 INFO L93 Difference]: Finished difference Result 139 states and 197 transitions. [2020-10-12 15:38:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:58,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 15:38:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:58,356 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:38:58,356 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 15:38:58,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 15:38:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 89. [2020-10-12 15:38:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 15:38:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2020-10-12 15:38:58,368 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 129 transitions. Word has length 22 [2020-10-12 15:38:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:58,369 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 129 transitions. [2020-10-12 15:38:58,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 129 transitions. [2020-10-12 15:38:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:58,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:58,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:58,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:38:58,371 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:58,371 INFO L82 PathProgramCache]: Analyzing trace with hash 238325853, now seen corresponding path program 2 times [2020-10-12 15:38:58,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:58,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969673899] [2020-10-12 15:38:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:58,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:58,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:58,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:58,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-12 15:38:58,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:38:58,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:58,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:58,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:58,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:58,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:58,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:58,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:58,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:58,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:58,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:58,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:58,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969673899] [2020-10-12 15:38:58,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:58,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:38:58,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706679705] [2020-10-12 15:38:58,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:58,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:58,770 INFO L87 Difference]: Start difference. First operand 89 states and 129 transitions. Second operand 8 states. [2020-10-12 15:38:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:38:59,168 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-10-12 15:38:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:38:59,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 15:38:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:38:59,171 INFO L225 Difference]: With dead ends: 135 [2020-10-12 15:38:59,171 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 15:38:59,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:38:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 15:38:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2020-10-12 15:38:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 15:38:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 135 transitions. [2020-10-12 15:38:59,184 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 135 transitions. Word has length 22 [2020-10-12 15:38:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:38:59,185 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 135 transitions. [2020-10-12 15:38:59,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:38:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 135 transitions. [2020-10-12 15:38:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:38:59,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:38:59,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:38:59,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:38:59,188 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:38:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:38:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash 238327775, now seen corresponding path program 1 times [2020-10-12 15:38:59,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:38:59,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137131481] [2020-10-12 15:38:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:38:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-12 15:38:59,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:38:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:38:59,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:38:59,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:59,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:38:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:38:59,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:38:59,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:38:59,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:38:59,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:38:59,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:38:59,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:38:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:38:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:38:59,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:38:59,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:38:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:38:59,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137131481] [2020-10-12 15:38:59,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:38:59,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:38:59,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202977822] [2020-10-12 15:38:59,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:38:59,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:38:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:38:59,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:38:59,686 INFO L87 Difference]: Start difference. First operand 93 states and 135 transitions. Second operand 8 states. [2020-10-12 15:39:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:00,001 INFO L93 Difference]: Finished difference Result 153 states and 226 transitions. [2020-10-12 15:39:00,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:00,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 15:39:00,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:00,003 INFO L225 Difference]: With dead ends: 153 [2020-10-12 15:39:00,003 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 15:39:00,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 15:39:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-12 15:39:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 15:39:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2020-10-12 15:39:00,015 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 123 transitions. Word has length 22 [2020-10-12 15:39:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:00,015 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 123 transitions. [2020-10-12 15:39:00,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:39:00,016 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2020-10-12 15:39:00,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:39:00,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:00,017 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] [2020-10-12 15:39:00,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:39:00,017 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:00,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2035848896, now seen corresponding path program 1 times [2020-10-12 15:39:00,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:00,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487975593] [2020-10-12 15:39:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:00,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:00,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:39:00,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:00,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-12 15:39:00,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:39:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:00,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:00,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:00,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:00,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:00,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:00,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:00,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:00,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:00,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:00,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:00,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:00,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487975593] [2020-10-12 15:39:00,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:00,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:00,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944100063] [2020-10-12 15:39:00,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:00,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:00,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:00,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:00,495 INFO L87 Difference]: Start difference. First operand 85 states and 123 transitions. Second operand 9 states. [2020-10-12 15:39:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:00,866 INFO L93 Difference]: Finished difference Result 162 states and 234 transitions. [2020-10-12 15:39:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 15:39:00,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 15:39:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:00,868 INFO L225 Difference]: With dead ends: 162 [2020-10-12 15:39:00,868 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 15:39:00,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 15:39:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2020-10-12 15:39:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 15:39:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2020-10-12 15:39:00,879 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 24 [2020-10-12 15:39:00,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:00,879 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2020-10-12 15:39:00,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2020-10-12 15:39:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:39:00,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:00,881 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] [2020-10-12 15:39:00,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:39:00,881 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2035846974, now seen corresponding path program 1 times [2020-10-12 15:39:00,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:00,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588295414] [2020-10-12 15:39:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:01,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:39:01,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:01,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-12 15:39:01,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:01,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:01,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:01,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:01,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:01,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:01,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:01,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:01,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:01,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:01,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588295414] [2020-10-12 15:39:01,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:01,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:01,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476797295] [2020-10-12 15:39:01,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:01,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:01,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:01,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:01,272 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand 9 states. [2020-10-12 15:39:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:01,613 INFO L93 Difference]: Finished difference Result 217 states and 319 transitions. [2020-10-12 15:39:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:01,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 15:39:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:01,615 INFO L225 Difference]: With dead ends: 217 [2020-10-12 15:39:01,615 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 15:39:01,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 15:39:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 111. [2020-10-12 15:39:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 15:39:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2020-10-12 15:39:01,641 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 24 [2020-10-12 15:39:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:01,641 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2020-10-12 15:39:01,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2020-10-12 15:39:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:39:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:01,648 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] [2020-10-12 15:39:01,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:39:01,649 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:01,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1978590594, now seen corresponding path program 1 times [2020-10-12 15:39:01,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:01,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854839209] [2020-10-12 15:39:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:01,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:02,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:39:02,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:02,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-12 15:39:02,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:02,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:02,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:02,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:39:02,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:02,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:02,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:02,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:02,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:02,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:39:02,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:02,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:02,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:02,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:02,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:02,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854839209] [2020-10-12 15:39:02,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:02,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:02,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197777137] [2020-10-12 15:39:02,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:02,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:02,219 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand 9 states. [2020-10-12 15:39:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:02,579 INFO L93 Difference]: Finished difference Result 171 states and 246 transitions. [2020-10-12 15:39:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:02,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 15:39:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:02,583 INFO L225 Difference]: With dead ends: 171 [2020-10-12 15:39:02,584 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 15:39:02,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 15:39:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2020-10-12 15:39:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 15:39:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-10-12 15:39:02,601 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 24 [2020-10-12 15:39:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:02,601 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-10-12 15:39:02,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-10-12 15:39:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 15:39:02,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:02,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:02,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:39:02,606 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1177260920, now seen corresponding path program 1 times [2020-10-12 15:39:02,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:02,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539364150] [2020-10-12 15:39:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:02,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:02,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:03,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:39:03,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:03,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-12 15:39:03,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:03,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:03,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:03,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:39:03,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:03,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:03,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:03,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:03,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:03,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:03,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:03,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539364150] [2020-10-12 15:39:03,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:03,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:03,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005957163] [2020-10-12 15:39:03,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:03,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:03,495 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 10 states. [2020-10-12 15:39:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:03,796 INFO L93 Difference]: Finished difference Result 180 states and 261 transitions. [2020-10-12 15:39:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:03,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 15:39:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:03,798 INFO L225 Difference]: With dead ends: 180 [2020-10-12 15:39:03,798 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 15:39:03,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 15:39:03,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-10-12 15:39:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 15:39:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions. [2020-10-12 15:39:03,808 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 26 [2020-10-12 15:39:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:03,808 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 160 transitions. [2020-10-12 15:39:03,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions. [2020-10-12 15:39:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:03,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:03,809 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:03,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:39:03,810 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1609413667, now seen corresponding path program 2 times [2020-10-12 15:39:03,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:03,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208224353] [2020-10-12 15:39:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:03,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:03,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:04,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:04,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:04,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-12 15:39:04,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:39:04,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:39:04,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:04,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:04,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:04,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:04,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:04,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:04,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:39:04,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:04,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:04,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:04,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208224353] [2020-10-12 15:39:04,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:04,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 15:39:04,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883399682] [2020-10-12 15:39:04,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 15:39:04,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:04,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 15:39:04,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:39:04,380 INFO L87 Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 8 states. [2020-10-12 15:39:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:04,706 INFO L93 Difference]: Finished difference Result 261 states and 373 transitions. [2020-10-12 15:39:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:04,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 15:39:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:04,708 INFO L225 Difference]: With dead ends: 261 [2020-10-12 15:39:04,708 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 15:39:04,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 15:39:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-10-12 15:39:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 15:39:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 153 transitions. [2020-10-12 15:39:04,724 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 153 transitions. Word has length 28 [2020-10-12 15:39:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:04,724 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 153 transitions. [2020-10-12 15:39:04,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 15:39:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 153 transitions. [2020-10-12 15:39:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:04,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:04,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:04,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:39:04,726 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1528741190, now seen corresponding path program 2 times [2020-10-12 15:39:04,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:04,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525064972] [2020-10-12 15:39:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:05,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:05,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:05,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-12 15:39:05,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:05,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:05,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:05,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:05,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:05,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:39:05,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:05,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:05,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:05,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:05,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:05,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525064972] [2020-10-12 15:39:05,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:05,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:05,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099795130] [2020-10-12 15:39:05,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:05,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:05,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:05,220 INFO L87 Difference]: Start difference. First operand 115 states and 153 transitions. Second operand 10 states. [2020-10-12 15:39:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:05,602 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2020-10-12 15:39:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:05,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 15:39:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:05,604 INFO L225 Difference]: With dead ends: 154 [2020-10-12 15:39:05,604 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 15:39:05,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:39:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 15:39:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2020-10-12 15:39:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 15:39:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2020-10-12 15:39:05,617 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 28 [2020-10-12 15:39:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:05,617 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2020-10-12 15:39:05,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2020-10-12 15:39:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:05,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:05,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:05,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:39:05,620 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1528743112, now seen corresponding path program 2 times [2020-10-12 15:39:05,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:05,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938117424] [2020-10-12 15:39:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:05,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:06,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:06,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:06,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-12 15:39:06,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:06,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:06,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:06,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:06,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:06,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:06,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:06,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:06,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:06,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:06,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:06,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:06,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:06,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:06,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:06,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938117424] [2020-10-12 15:39:06,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:06,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:06,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134129411] [2020-10-12 15:39:06,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:06,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:06,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:06,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:06,393 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand 10 states. [2020-10-12 15:39:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:07,175 INFO L93 Difference]: Finished difference Result 249 states and 330 transitions. [2020-10-12 15:39:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:07,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 15:39:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:07,178 INFO L225 Difference]: With dead ends: 249 [2020-10-12 15:39:07,178 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 15:39:07,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 15:39:07,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 128. [2020-10-12 15:39:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 15:39:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 170 transitions. [2020-10-12 15:39:07,195 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 170 transitions. Word has length 28 [2020-10-12 15:39:07,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:07,196 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 170 transitions. [2020-10-12 15:39:07,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 170 transitions. [2020-10-12 15:39:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:39:07,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:07,197 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:07,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:39:07,198 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:07,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1585999492, now seen corresponding path program 2 times [2020-10-12 15:39:07,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:07,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470543802] [2020-10-12 15:39:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:07,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:07,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:07,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:39:07,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:07,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-12 15:39:07,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 15:39:08,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:08,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:08,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:08,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:08,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:08,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:08,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:08,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:08,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:08,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470543802] [2020-10-12 15:39:08,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:08,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:08,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205030743] [2020-10-12 15:39:08,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:08,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:08,043 INFO L87 Difference]: Start difference. First operand 128 states and 170 transitions. Second operand 10 states. [2020-10-12 15:39:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:08,557 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2020-10-12 15:39:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:08,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 15:39:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:08,561 INFO L225 Difference]: With dead ends: 179 [2020-10-12 15:39:08,562 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 15:39:08,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 15:39:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 127. [2020-10-12 15:39:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 15:39:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 169 transitions. [2020-10-12 15:39:08,578 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 169 transitions. Word has length 28 [2020-10-12 15:39:08,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:08,578 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 169 transitions. [2020-10-12 15:39:08,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 169 transitions. [2020-10-12 15:39:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:39:08,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:08,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:08,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:39:08,580 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1335344427, now seen corresponding path program 1 times [2020-10-12 15:39:08,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:08,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811322895] [2020-10-12 15:39:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:08,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:08,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:39:09,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:39:09,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-12 15:39:09,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:39:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:39:09,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:09,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:09,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:09,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:09,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:09,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:09,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:09,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:39:09,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811322895] [2020-10-12 15:39:09,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:09,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:09,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673231152] [2020-10-12 15:39:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:09,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:09,301 INFO L87 Difference]: Start difference. First operand 127 states and 169 transitions. Second operand 11 states. [2020-10-12 15:39:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:09,707 INFO L93 Difference]: Finished difference Result 168 states and 220 transitions. [2020-10-12 15:39:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:09,708 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 15:39:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:09,709 INFO L225 Difference]: With dead ends: 168 [2020-10-12 15:39:09,709 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 15:39:09,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:39:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 15:39:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2020-10-12 15:39:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 15:39:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2020-10-12 15:39:09,728 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 30 [2020-10-12 15:39:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:09,728 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2020-10-12 15:39:09,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2020-10-12 15:39:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:39:09,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:09,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:09,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:39:09,729 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:09,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1614159849, now seen corresponding path program 3 times [2020-10-12 15:39:09,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:09,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322137864] [2020-10-12 15:39:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:09,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:09,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:09,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:39:09,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:09,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-12 15:39:09,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:09,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:09,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:09,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:39:09,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:10,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:10,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:10,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:10,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:10,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:10,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:10,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322137864] [2020-10-12 15:39:10,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:10,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:10,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819335223] [2020-10-12 15:39:10,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:10,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:10,185 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand 9 states. [2020-10-12 15:39:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:10,603 INFO L93 Difference]: Finished difference Result 210 states and 289 transitions. [2020-10-12 15:39:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:39:10,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-12 15:39:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:10,605 INFO L225 Difference]: With dead ends: 210 [2020-10-12 15:39:10,605 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 15:39:10,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 15:39:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-12 15:39:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 15:39:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 181 transitions. [2020-10-12 15:39:10,624 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 181 transitions. Word has length 30 [2020-10-12 15:39:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:10,625 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 181 transitions. [2020-10-12 15:39:10,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 181 transitions. [2020-10-12 15:39:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:39:10,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:10,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:10,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:39:10,626 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -635566720, now seen corresponding path program 1 times [2020-10-12 15:39:10,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:10,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176495975] [2020-10-12 15:39:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:10,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:10,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:39:12,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:39:12,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-12 15:39:12,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:39:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 15:39:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:39:12,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:12,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:12,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:12,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:12,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:12,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:39:12,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:12,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:39:12,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176495975] [2020-10-12 15:39:12,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:12,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:39:12,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397074873] [2020-10-12 15:39:12,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:39:12,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:39:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:39:12,885 INFO L87 Difference]: Start difference. First operand 137 states and 181 transitions. Second operand 9 states. [2020-10-12 15:39:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:13,132 INFO L93 Difference]: Finished difference Result 249 states and 339 transitions. [2020-10-12 15:39:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:13,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-12 15:39:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:13,134 INFO L225 Difference]: With dead ends: 249 [2020-10-12 15:39:13,135 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 15:39:13,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 15:39:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 116. [2020-10-12 15:39:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-12 15:39:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2020-10-12 15:39:13,147 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 30 [2020-10-12 15:39:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:13,147 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2020-10-12 15:39:13,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:39:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2020-10-12 15:39:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:39:13,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:13,148 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:13,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:39:13,149 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash 656732581, now seen corresponding path program 1 times [2020-10-12 15:39:13,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:13,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245343739] [2020-10-12 15:39:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:13,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:14,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:39:14,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:39:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-12 15:39:14,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:39:14,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:39:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:14,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:14,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:14,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:14,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:14,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:14,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:14,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:14,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:14,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:14,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:39:14,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245343739] [2020-10-12 15:39:14,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:14,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:14,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285370649] [2020-10-12 15:39:14,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:14,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:14,351 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. Second operand 12 states. [2020-10-12 15:39:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:15,003 INFO L93 Difference]: Finished difference Result 238 states and 322 transitions. [2020-10-12 15:39:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:39:15,004 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 15:39:15,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:15,005 INFO L225 Difference]: With dead ends: 238 [2020-10-12 15:39:15,006 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 15:39:15,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 15:39:15,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 148. [2020-10-12 15:39:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 15:39:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 201 transitions. [2020-10-12 15:39:15,020 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 201 transitions. Word has length 32 [2020-10-12 15:39:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:15,021 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 201 transitions. [2020-10-12 15:39:15,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 201 transitions. [2020-10-12 15:39:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:39:15,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:15,022 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:15,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:39:15,022 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:15,023 INFO L82 PathProgramCache]: Analyzing trace with hash -354384669, now seen corresponding path program 1 times [2020-10-12 15:39:15,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:15,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964337286] [2020-10-12 15:39:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:15,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:15,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:39:15,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:39:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-12 15:39:15,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:39:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 15:39:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:39:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:15,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:15,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:15,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:15,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:15,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:15,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:15,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:15,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:39:15,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964337286] [2020-10-12 15:39:15,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:15,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:39:15,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415536879] [2020-10-12 15:39:15,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:39:15,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:39:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:39:15,645 INFO L87 Difference]: Start difference. First operand 148 states and 201 transitions. Second operand 10 states. [2020-10-12 15:39:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:16,085 INFO L93 Difference]: Finished difference Result 411 states and 586 transitions. [2020-10-12 15:39:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:39:16,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-12 15:39:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:16,087 INFO L225 Difference]: With dead ends: 411 [2020-10-12 15:39:16,088 INFO L226 Difference]: Without dead ends: 326 [2020-10-12 15:39:16,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-12 15:39:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 144. [2020-10-12 15:39:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 15:39:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 201 transitions. [2020-10-12 15:39:16,103 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 201 transitions. Word has length 32 [2020-10-12 15:39:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:16,103 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 201 transitions. [2020-10-12 15:39:16,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:39:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 201 transitions. [2020-10-12 15:39:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:39:16,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:16,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:16,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:39:16,104 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1163733217, now seen corresponding path program 2 times [2020-10-12 15:39:16,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:16,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492958713] [2020-10-12 15:39:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:16,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:17,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:17,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:39:17,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:39:17,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1128 [2020-10-12 15:39:17,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:17,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:39:17,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:17,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:17,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:17,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:17,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:17,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:17,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:17,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 15:39:17,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492958713] [2020-10-12 15:39:17,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:17,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:17,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34209626] [2020-10-12 15:39:17,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:17,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:17,618 INFO L87 Difference]: Start difference. First operand 144 states and 201 transitions. Second operand 13 states. [2020-10-12 15:39:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:18,106 INFO L93 Difference]: Finished difference Result 243 states and 340 transitions. [2020-10-12 15:39:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:18,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 15:39:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:18,110 INFO L225 Difference]: With dead ends: 243 [2020-10-12 15:39:18,110 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 15:39:18,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:39:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 15:39:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 142. [2020-10-12 15:39:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 15:39:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 202 transitions. [2020-10-12 15:39:18,125 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 202 transitions. Word has length 32 [2020-10-12 15:39:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:18,125 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 202 transitions. [2020-10-12 15:39:18,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 202 transitions. [2020-10-12 15:39:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:39:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:18,126 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:18,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:39:18,126 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1138713012, now seen corresponding path program 4 times [2020-10-12 15:39:18,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:18,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743962545] [2020-10-12 15:39:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:18,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:18,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:39:18,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:18,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 15:39:18,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:18,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:39:18,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:18,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:18,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:18,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:18,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:18,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:18,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:18,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:18,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:18,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743962545] [2020-10-12 15:39:18,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:18,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:18,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608402021] [2020-10-12 15:39:18,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:18,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:18,721 INFO L87 Difference]: Start difference. First operand 142 states and 202 transitions. Second operand 11 states. [2020-10-12 15:39:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:19,179 INFO L93 Difference]: Finished difference Result 169 states and 234 transitions. [2020-10-12 15:39:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:39:19,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 15:39:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:19,181 INFO L225 Difference]: With dead ends: 169 [2020-10-12 15:39:19,181 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 15:39:19,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 15:39:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2020-10-12 15:39:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 15:39:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 213 transitions. [2020-10-12 15:39:19,198 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 213 transitions. Word has length 32 [2020-10-12 15:39:19,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:19,198 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 213 transitions. [2020-10-12 15:39:19,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 213 transitions. [2020-10-12 15:39:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:39:19,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:19,199 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:19,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:39:19,199 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1138711090, now seen corresponding path program 3 times [2020-10-12 15:39:19,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:19,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225969998] [2020-10-12 15:39:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:19,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:19,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:39:19,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:19,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-12 15:39:19,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:19,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:19,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:19,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:39:19,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:19,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:19,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:19,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:19,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:19,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:19,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:19,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:19,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:19,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225969998] [2020-10-12 15:39:19,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:19,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:19,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372533898] [2020-10-12 15:39:19,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:19,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:19,802 INFO L87 Difference]: Start difference. First operand 151 states and 213 transitions. Second operand 11 states. [2020-10-12 15:39:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:20,473 INFO L93 Difference]: Finished difference Result 262 states and 378 transitions. [2020-10-12 15:39:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:20,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 15:39:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:20,476 INFO L225 Difference]: With dead ends: 262 [2020-10-12 15:39:20,476 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 15:39:20,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:39:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 15:39:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2020-10-12 15:39:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 15:39:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 212 transitions. [2020-10-12 15:39:20,495 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 212 transitions. Word has length 32 [2020-10-12 15:39:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:20,496 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 212 transitions. [2020-10-12 15:39:20,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 212 transitions. [2020-10-12 15:39:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:39:20,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:20,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:20,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:39:20,498 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1081454710, now seen corresponding path program 3 times [2020-10-12 15:39:20,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:20,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585066357] [2020-10-12 15:39:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:20,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:20,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:39:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-12 15:39:20,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:39:20,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:39:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:21,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:21,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:21,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:21,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:21,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:21,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:21,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:21,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:21,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:39:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:21,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585066357] [2020-10-12 15:39:21,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:21,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:39:21,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094030733] [2020-10-12 15:39:21,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:39:21,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:39:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:39:21,316 INFO L87 Difference]: Start difference. First operand 151 states and 212 transitions. Second operand 11 states. [2020-10-12 15:39:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:21,851 INFO L93 Difference]: Finished difference Result 162 states and 225 transitions. [2020-10-12 15:39:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:21,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 15:39:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:21,854 INFO L225 Difference]: With dead ends: 162 [2020-10-12 15:39:21,854 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 15:39:21,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 15:39:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2020-10-12 15:39:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 15:39:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 196 transitions. [2020-10-12 15:39:21,882 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 196 transitions. Word has length 32 [2020-10-12 15:39:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:21,882 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 196 transitions. [2020-10-12 15:39:21,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:39:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 196 transitions. [2020-10-12 15:39:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:21,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:21,883 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:21,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:39:21,883 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2008819857, now seen corresponding path program 5 times [2020-10-12 15:39:21,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:21,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221062785] [2020-10-12 15:39:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:21,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:22,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:22,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:22,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-12 15:39:22,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:22,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:22,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:22,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:22,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:22,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:22,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:22,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:22,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221062785] [2020-10-12 15:39:22,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:22,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:22,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878215301] [2020-10-12 15:39:22,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:22,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:22,547 INFO L87 Difference]: Start difference. First operand 138 states and 196 transitions. Second operand 12 states. [2020-10-12 15:39:23,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:23,243 INFO L93 Difference]: Finished difference Result 169 states and 235 transitions. [2020-10-12 15:39:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:39:23,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 15:39:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:23,245 INFO L225 Difference]: With dead ends: 169 [2020-10-12 15:39:23,245 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 15:39:23,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 15:39:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2020-10-12 15:39:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 15:39:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 222 transitions. [2020-10-12 15:39:23,265 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 222 transitions. Word has length 34 [2020-10-12 15:39:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:23,266 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 222 transitions. [2020-10-12 15:39:23,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 222 transitions. [2020-10-12 15:39:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:23,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:23,269 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:23,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:39:23,270 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:23,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:23,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2008817935, now seen corresponding path program 4 times [2020-10-12 15:39:23,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:23,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212801467] [2020-10-12 15:39:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:23,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:23,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:23,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:23,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:23,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-12 15:39:23,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:23,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:23,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:24,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:24,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:24,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:24,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:24,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:24,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:24,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:24,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:24,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212801467] [2020-10-12 15:39:24,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:24,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:24,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875637151] [2020-10-12 15:39:24,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:24,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:24,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:24,086 INFO L87 Difference]: Start difference. First operand 158 states and 222 transitions. Second operand 12 states. [2020-10-12 15:39:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:24,795 INFO L93 Difference]: Finished difference Result 277 states and 400 transitions. [2020-10-12 15:39:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:24,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 15:39:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:24,800 INFO L225 Difference]: With dead ends: 277 [2020-10-12 15:39:24,800 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 15:39:24,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 15:39:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 170. [2020-10-12 15:39:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 15:39:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 236 transitions. [2020-10-12 15:39:24,834 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 236 transitions. Word has length 34 [2020-10-12 15:39:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:24,835 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 236 transitions. [2020-10-12 15:39:24,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 236 transitions. [2020-10-12 15:39:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:24,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:24,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:24,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:39:24,836 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1951561555, now seen corresponding path program 1 times [2020-10-12 15:39:24,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:24,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054121125] [2020-10-12 15:39:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:24,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:25,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:25,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:25,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:25,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:25,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:25,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:25,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:25,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:25,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:25,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:25,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:25,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:25,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:25,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054121125] [2020-10-12 15:39:25,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:25,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:25,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116972878] [2020-10-12 15:39:25,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:25,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:25,567 INFO L87 Difference]: Start difference. First operand 170 states and 236 transitions. Second operand 12 states. [2020-10-12 15:39:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:26,323 INFO L93 Difference]: Finished difference Result 183 states and 252 transitions. [2020-10-12 15:39:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:26,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 15:39:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:26,327 INFO L225 Difference]: With dead ends: 183 [2020-10-12 15:39:26,327 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 15:39:26,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 15:39:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2020-10-12 15:39:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-12 15:39:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 241 transitions. [2020-10-12 15:39:26,345 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 241 transitions. Word has length 34 [2020-10-12 15:39:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:26,345 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 241 transitions. [2020-10-12 15:39:26,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 241 transitions. [2020-10-12 15:39:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:26,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:26,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:26,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:39:26,347 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:26,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1750654419, now seen corresponding path program 2 times [2020-10-12 15:39:26,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:26,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845693161] [2020-10-12 15:39:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:26,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:26,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:26,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:26,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-12 15:39:26,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:26,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:26,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:26,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:27,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:27,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:27,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:27,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:27,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845693161] [2020-10-12 15:39:27,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:27,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:27,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968740540] [2020-10-12 15:39:27,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:27,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:27,072 INFO L87 Difference]: Start difference. First operand 174 states and 241 transitions. Second operand 12 states. [2020-10-12 15:39:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:27,702 INFO L93 Difference]: Finished difference Result 184 states and 253 transitions. [2020-10-12 15:39:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:27,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 15:39:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:27,705 INFO L225 Difference]: With dead ends: 184 [2020-10-12 15:39:27,705 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 15:39:27,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 15:39:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 171. [2020-10-12 15:39:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 15:39:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2020-10-12 15:39:27,723 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 34 [2020-10-12 15:39:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:27,723 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2020-10-12 15:39:27,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2020-10-12 15:39:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:39:27,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:27,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:27,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:39:27,724 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1693396117, now seen corresponding path program 4 times [2020-10-12 15:39:27,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:27,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692039107] [2020-10-12 15:39:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:27,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:28,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 15:39:28,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:28,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 498 [2020-10-12 15:39:28,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:28,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:39:28,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:28,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:39:28,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:28,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:28,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:28,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:28,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:28,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:28,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:28,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:28,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:28,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:28,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692039107] [2020-10-12 15:39:28,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:28,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:28,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315715301] [2020-10-12 15:39:28,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:28,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:28,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:28,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:28,703 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand 12 states. [2020-10-12 15:39:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:29,402 INFO L93 Difference]: Finished difference Result 185 states and 254 transitions. [2020-10-12 15:39:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:29,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 15:39:29,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:29,404 INFO L225 Difference]: With dead ends: 185 [2020-10-12 15:39:29,405 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 15:39:29,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:39:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 15:39:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2020-10-12 15:39:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 15:39:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 238 transitions. [2020-10-12 15:39:29,422 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 238 transitions. Word has length 34 [2020-10-12 15:39:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:29,423 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 238 transitions. [2020-10-12 15:39:29,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 238 transitions. [2020-10-12 15:39:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:29,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:29,424 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:29,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:39:29,424 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash -189126004, now seen corresponding path program 1 times [2020-10-12 15:39:29,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:29,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466857782] [2020-10-12 15:39:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:29,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:29,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:29,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:29,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:29,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-12 15:39:29,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:29,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:29,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:29,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:30,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:30,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:30,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:39:30,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466857782] [2020-10-12 15:39:30,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:30,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:30,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189917830] [2020-10-12 15:39:30,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:30,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:30,093 INFO L87 Difference]: Start difference. First operand 172 states and 238 transitions. Second operand 12 states. [2020-10-12 15:39:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:30,387 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2020-10-12 15:39:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:39:30,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-12 15:39:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:30,390 INFO L225 Difference]: With dead ends: 220 [2020-10-12 15:39:30,390 INFO L226 Difference]: Without dead ends: 218 [2020-10-12 15:39:30,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:39:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-12 15:39:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2020-10-12 15:39:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 15:39:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 276 transitions. [2020-10-12 15:39:30,409 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 276 transitions. Word has length 38 [2020-10-12 15:39:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:30,410 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 276 transitions. [2020-10-12 15:39:30,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 276 transitions. [2020-10-12 15:39:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:30,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:30,411 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:30,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:39:30,411 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:30,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:30,412 INFO L82 PathProgramCache]: Analyzing trace with hash -189124082, now seen corresponding path program 2 times [2020-10-12 15:39:30,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:30,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452178861] [2020-10-12 15:39:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:30,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:31,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:31,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:31,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-12 15:39:31,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:31,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:31,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:31,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:31,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:31,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:31,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:31,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:31,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452178861] [2020-10-12 15:39:31,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:31,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:31,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373672744] [2020-10-12 15:39:31,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:31,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:31,219 INFO L87 Difference]: Start difference. First operand 200 states and 276 transitions. Second operand 13 states. [2020-10-12 15:39:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:31,724 INFO L93 Difference]: Finished difference Result 410 states and 586 transitions. [2020-10-12 15:39:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:31,724 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:31,726 INFO L225 Difference]: With dead ends: 410 [2020-10-12 15:39:31,726 INFO L226 Difference]: Without dead ends: 292 [2020-10-12 15:39:31,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-12 15:39:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 249. [2020-10-12 15:39:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 15:39:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 341 transitions. [2020-10-12 15:39:31,748 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 341 transitions. Word has length 38 [2020-10-12 15:39:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:31,749 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 341 transitions. [2020-10-12 15:39:31,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 341 transitions. [2020-10-12 15:39:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:31,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:31,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:31,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:39:31,750 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1200243254, now seen corresponding path program 1 times [2020-10-12 15:39:31,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:31,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734525077] [2020-10-12 15:39:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:32,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:32,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:32,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:32,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:32,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:32,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:32,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:32,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734525077] [2020-10-12 15:39:32,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:32,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:32,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547809635] [2020-10-12 15:39:32,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:32,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:32,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:32,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:32,523 INFO L87 Difference]: Start difference. First operand 249 states and 341 transitions. Second operand 13 states. [2020-10-12 15:39:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:33,052 INFO L93 Difference]: Finished difference Result 324 states and 447 transitions. [2020-10-12 15:39:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:33,053 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:33,056 INFO L225 Difference]: With dead ends: 324 [2020-10-12 15:39:33,056 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 15:39:33,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:39:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 15:39:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 252. [2020-10-12 15:39:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-12 15:39:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 345 transitions. [2020-10-12 15:39:33,081 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 345 transitions. Word has length 38 [2020-10-12 15:39:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:33,081 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 345 transitions. [2020-10-12 15:39:33,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 345 transitions. [2020-10-12 15:39:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:33,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:33,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:33,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:39:33,083 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -67216395, now seen corresponding path program 6 times [2020-10-12 15:39:33,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:33,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245457487] [2020-10-12 15:39:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:33,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:33,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:33,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-12 15:39:33,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:33,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:33,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:33,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:33,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:33,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:33,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:33,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:33,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:33,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:33,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:33,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:33,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:33,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245457487] [2020-10-12 15:39:33,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:33,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:33,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927735264] [2020-10-12 15:39:33,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:33,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:33,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:33,848 INFO L87 Difference]: Start difference. First operand 252 states and 345 transitions. Second operand 13 states. [2020-10-12 15:39:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:34,673 INFO L93 Difference]: Finished difference Result 283 states and 384 transitions. [2020-10-12 15:39:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:34,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:34,677 INFO L225 Difference]: With dead ends: 283 [2020-10-12 15:39:34,677 INFO L226 Difference]: Without dead ends: 281 [2020-10-12 15:39:34,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:39:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-12 15:39:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2020-10-12 15:39:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 15:39:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 370 transitions. [2020-10-12 15:39:34,715 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 370 transitions. Word has length 38 [2020-10-12 15:39:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:34,715 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 370 transitions. [2020-10-12 15:39:34,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 370 transitions. [2020-10-12 15:39:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:34,717 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:34,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:39:34,730 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash -67214473, now seen corresponding path program 5 times [2020-10-12 15:39:34,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:34,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276409939] [2020-10-12 15:39:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:34,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:35,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:35,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:35,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:35,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 576 [2020-10-12 15:39:35,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:35,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:35,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:35,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:35,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:35,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:35,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:35,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276409939] [2020-10-12 15:39:35,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:35,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:35,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450789684] [2020-10-12 15:39:35,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:35,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:35,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:35,834 INFO L87 Difference]: Start difference. First operand 271 states and 370 transitions. Second operand 13 states. [2020-10-12 15:39:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:37,001 INFO L93 Difference]: Finished difference Result 392 states and 551 transitions. [2020-10-12 15:39:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:39:37,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:37,003 INFO L225 Difference]: With dead ends: 392 [2020-10-12 15:39:37,003 INFO L226 Difference]: Without dead ends: 300 [2020-10-12 15:39:37,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-12 15:39:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 282. [2020-10-12 15:39:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 15:39:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 383 transitions. [2020-10-12 15:39:37,052 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 383 transitions. Word has length 38 [2020-10-12 15:39:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:37,053 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 383 transitions. [2020-10-12 15:39:37,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 383 transitions. [2020-10-12 15:39:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:37,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:37,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:37,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:39:37,054 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash -9958093, now seen corresponding path program 3 times [2020-10-12 15:39:37,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:37,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057638721] [2020-10-12 15:39:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:37,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:37,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:37,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:37,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:37,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-12 15:39:37,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:37,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:37,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:38,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:38,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:38,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:38,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:38,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:38,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:38,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:38,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:38,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057638721] [2020-10-12 15:39:38,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:38,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:38,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837981589] [2020-10-12 15:39:38,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:38,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:38,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:38,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:38,040 INFO L87 Difference]: Start difference. First operand 282 states and 383 transitions. Second operand 13 states. [2020-10-12 15:39:38,571 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 15:39:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:39,307 INFO L93 Difference]: Finished difference Result 296 states and 399 transitions. [2020-10-12 15:39:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:39:39,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:39,310 INFO L225 Difference]: With dead ends: 296 [2020-10-12 15:39:39,310 INFO L226 Difference]: Without dead ends: 294 [2020-10-12 15:39:39,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:39:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-12 15:39:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 274. [2020-10-12 15:39:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 15:39:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 373 transitions. [2020-10-12 15:39:39,336 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 373 transitions. Word has length 38 [2020-10-12 15:39:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:39,336 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 373 transitions. [2020-10-12 15:39:39,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 373 transitions. [2020-10-12 15:39:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:39,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:39,338 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:39,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:39:39,338 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:39,339 INFO L82 PathProgramCache]: Analyzing trace with hash 190949043, now seen corresponding path program 4 times [2020-10-12 15:39:39,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:39,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359353179] [2020-10-12 15:39:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:39,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:40,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:40,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:40,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-12 15:39:40,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:40,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:40,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:40,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:40,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:40,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:40,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:40,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:40,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:40,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:40,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:40,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:40,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359353179] [2020-10-12 15:39:40,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:40,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:40,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031605885] [2020-10-12 15:39:40,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:40,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:40,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:40,591 INFO L87 Difference]: Start difference. First operand 274 states and 373 transitions. Second operand 13 states. [2020-10-12 15:39:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:41,438 INFO L93 Difference]: Finished difference Result 286 states and 387 transitions. [2020-10-12 15:39:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:39:41,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:41,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:41,441 INFO L225 Difference]: With dead ends: 286 [2020-10-12 15:39:41,441 INFO L226 Difference]: Without dead ends: 284 [2020-10-12 15:39:41,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-12 15:39:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 271. [2020-10-12 15:39:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 15:39:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 369 transitions. [2020-10-12 15:39:41,466 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 369 transitions. Word has length 38 [2020-10-12 15:39:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:41,466 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 369 transitions. [2020-10-12 15:39:41,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 369 transitions. [2020-10-12 15:39:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:39:41,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:41,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:41,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:39:41,468 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash 248207345, now seen corresponding path program 5 times [2020-10-12 15:39:41,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:41,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698714533] [2020-10-12 15:39:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:41,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:42,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:42,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:39:42,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:42,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-12 15:39:42,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:42,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:42,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:42,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:42,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:42,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:42,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:42,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698714533] [2020-10-12 15:39:42,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:42,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:42,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687380515] [2020-10-12 15:39:42,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:42,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:42,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:42,700 INFO L87 Difference]: Start difference. First operand 271 states and 369 transitions. Second operand 13 states. [2020-10-12 15:39:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:43,512 INFO L93 Difference]: Finished difference Result 285 states and 386 transitions. [2020-10-12 15:39:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:39:43,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-12 15:39:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:43,514 INFO L225 Difference]: With dead ends: 285 [2020-10-12 15:39:43,515 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 15:39:43,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 15:39:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 256. [2020-10-12 15:39:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-12 15:39:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 351 transitions. [2020-10-12 15:39:43,537 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 351 transitions. Word has length 38 [2020-10-12 15:39:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:43,537 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 351 transitions. [2020-10-12 15:39:43,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:43,538 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 351 transitions. [2020-10-12 15:39:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:39:43,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:43,539 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:43,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:39:43,539 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1619848920, now seen corresponding path program 7 times [2020-10-12 15:39:43,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:43,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157399841] [2020-10-12 15:39:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:43,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:43,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:43,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:39:43,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:43,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-12 15:39:43,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:43,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:43,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:39:43,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:44,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:44,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:44,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:44,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:44,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:44,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:44,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157399841] [2020-10-12 15:39:44,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:44,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:39:44,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535323181] [2020-10-12 15:39:44,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:39:44,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:39:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:39:44,316 INFO L87 Difference]: Start difference. First operand 256 states and 351 transitions. Second operand 12 states. [2020-10-12 15:39:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:44,989 INFO L93 Difference]: Finished difference Result 398 states and 558 transitions. [2020-10-12 15:39:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:39:44,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-12 15:39:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:44,992 INFO L225 Difference]: With dead ends: 398 [2020-10-12 15:39:44,992 INFO L226 Difference]: Without dead ends: 306 [2020-10-12 15:39:44,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-12 15:39:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 300. [2020-10-12 15:39:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-12 15:39:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 405 transitions. [2020-10-12 15:39:45,021 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 405 transitions. Word has length 40 [2020-10-12 15:39:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:45,021 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 405 transitions. [2020-10-12 15:39:45,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:39:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 405 transitions. [2020-10-12 15:39:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:45,022 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:45,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:39:45,023 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1190329362, now seen corresponding path program 2 times [2020-10-12 15:39:45,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:45,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399015873] [2020-10-12 15:39:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:45,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:45,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:46,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:46,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:46,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:39:46,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-12 15:39:46,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:46,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:46,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:39:46,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:46,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:46,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:46,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:46,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:46,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:46,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:46,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:46,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:46,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:46,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:46,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:46,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399015873] [2020-10-12 15:39:46,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:46,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:46,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101099536] [2020-10-12 15:39:46,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:46,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:46,480 INFO L87 Difference]: Start difference. First operand 300 states and 405 transitions. Second operand 13 states. [2020-10-12 15:39:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:47,571 INFO L93 Difference]: Finished difference Result 384 states and 519 transitions. [2020-10-12 15:39:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:39:47,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-12 15:39:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:47,576 INFO L225 Difference]: With dead ends: 384 [2020-10-12 15:39:47,576 INFO L226 Difference]: Without dead ends: 382 [2020-10-12 15:39:47,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:39:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-12 15:39:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 300. [2020-10-12 15:39:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-12 15:39:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 405 transitions. [2020-10-12 15:39:47,612 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 405 transitions. Word has length 42 [2020-10-12 15:39:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:47,613 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 405 transitions. [2020-10-12 15:39:47,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 405 transitions. [2020-10-12 15:39:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:47,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:47,614 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:47,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:39:47,615 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:47,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1828962516, now seen corresponding path program 3 times [2020-10-12 15:39:47,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:47,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718660467] [2020-10-12 15:39:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:47,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:47,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:47,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:48,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:48,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:48,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2485 [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 15:39:50,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:39:50,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:50,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:50,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:50,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:50,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:50,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:50,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:39:50,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:50,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:50,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:50,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 15:39:50,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718660467] [2020-10-12 15:39:50,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:50,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:50,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083341230] [2020-10-12 15:39:50,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:50,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:50,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:50,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:50,487 INFO L87 Difference]: Start difference. First operand 300 states and 405 transitions. Second operand 13 states. [2020-10-12 15:39:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:51,059 INFO L93 Difference]: Finished difference Result 531 states and 728 transitions. [2020-10-12 15:39:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:39:51,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-12 15:39:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:51,068 INFO L225 Difference]: With dead ends: 531 [2020-10-12 15:39:51,069 INFO L226 Difference]: Without dead ends: 439 [2020-10-12 15:39:51,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:39:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-12 15:39:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 365. [2020-10-12 15:39:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-12 15:39:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 482 transitions. [2020-10-12 15:39:51,105 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 482 transitions. Word has length 42 [2020-10-12 15:39:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:51,106 INFO L479 AbstractCegarLoop]: Abstraction has 365 states and 482 transitions. [2020-10-12 15:39:51,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 482 transitions. [2020-10-12 15:39:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:51,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:51,107 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:51,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:39:51,108 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 179214034, now seen corresponding path program 2 times [2020-10-12 15:39:51,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:51,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28968164] [2020-10-12 15:39:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:51,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:51,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:52,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:52,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:52,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:52,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:39:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1188 [2020-10-12 15:39:52,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:39:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:39:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:52,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:52,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:52,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:52,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:52,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:52,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:52,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:52,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:52,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28968164] [2020-10-12 15:39:52,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:52,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:39:52,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108450910] [2020-10-12 15:39:52,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:39:52,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:39:52,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:39:52,807 INFO L87 Difference]: Start difference. First operand 365 states and 482 transitions. Second operand 13 states. [2020-10-12 15:39:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:39:53,808 INFO L93 Difference]: Finished difference Result 628 states and 840 transitions. [2020-10-12 15:39:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:39:53,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-12 15:39:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:39:53,813 INFO L225 Difference]: With dead ends: 628 [2020-10-12 15:39:53,813 INFO L226 Difference]: Without dead ends: 449 [2020-10-12 15:39:53,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:39:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-12 15:39:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 396. [2020-10-12 15:39:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-12 15:39:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 519 transitions. [2020-10-12 15:39:53,843 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 519 transitions. Word has length 42 [2020-10-12 15:39:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:39:53,843 INFO L479 AbstractCegarLoop]: Abstraction has 396 states and 519 transitions. [2020-10-12 15:39:53,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:39:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 519 transitions. [2020-10-12 15:39:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:39:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:39:53,844 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:39:53,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:39:53,844 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:39:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:39:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash 8496718, now seen corresponding path program 2 times [2020-10-12 15:39:53,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:39:53,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667593720] [2020-10-12 15:39:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:39:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:53,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:56,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:58,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:58,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:39:58,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:39:58,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 15:39:58,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:39:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:39:58,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:39:58,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 15:39:59,436 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-10-12 15:39:59,603 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-12 15:39:59,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:39:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:39:59,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:39:59,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:39:59,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:39:59,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:39:59,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:39:59,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:39:59,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:39:59,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:39:59,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:39:59,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:39:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:39:59,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667593720] [2020-10-12 15:39:59,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:39:59,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:39:59,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662368113] [2020-10-12 15:39:59,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:39:59,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:39:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:39:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:39:59,839 INFO L87 Difference]: Start difference. First operand 396 states and 519 transitions. Second operand 16 states. [2020-10-12 15:40:01,269 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-12 15:40:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:01,919 INFO L93 Difference]: Finished difference Result 694 states and 921 transitions. [2020-10-12 15:40:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:40:01,919 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-12 15:40:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:01,922 INFO L225 Difference]: With dead ends: 694 [2020-10-12 15:40:01,923 INFO L226 Difference]: Without dead ends: 491 [2020-10-12 15:40:01,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:40:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-12 15:40:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 354. [2020-10-12 15:40:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-12 15:40:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 467 transitions. [2020-10-12 15:40:01,956 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 467 transitions. Word has length 42 [2020-10-12 15:40:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:01,957 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 467 transitions. [2020-10-12 15:40:01,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:40:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 467 transitions. [2020-10-12 15:40:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:01,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:01,958 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:01,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:40:01,959 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:01,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1312238971, now seen corresponding path program 8 times [2020-10-12 15:40:01,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:01,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709957516] [2020-10-12 15:40:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:02,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:03,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:03,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:03,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:03,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:03,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:03,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:03,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:03,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:03,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709957516] [2020-10-12 15:40:03,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:03,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:03,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685857510] [2020-10-12 15:40:03,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:03,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:03,069 INFO L87 Difference]: Start difference. First operand 354 states and 467 transitions. Second operand 14 states. [2020-10-12 15:40:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:04,146 INFO L93 Difference]: Finished difference Result 373 states and 490 transitions. [2020-10-12 15:40:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:40:04,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:40:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:04,149 INFO L225 Difference]: With dead ends: 373 [2020-10-12 15:40:04,149 INFO L226 Difference]: Without dead ends: 371 [2020-10-12 15:40:04,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-12 15:40:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 357. [2020-10-12 15:40:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-12 15:40:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 472 transitions. [2020-10-12 15:40:04,188 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 472 transitions. Word has length 42 [2020-10-12 15:40:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:04,189 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 472 transitions. [2020-10-12 15:40:04,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 472 transitions. [2020-10-12 15:40:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:04,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:04,190 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:04,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 15:40:04,190 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:04,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1312240893, now seen corresponding path program 6 times [2020-10-12 15:40:04,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:04,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338682180] [2020-10-12 15:40:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:04,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:04,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:04,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:04,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:05,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:05,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:05,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:05,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:05,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:05,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:40:05,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:05,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:05,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:05,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338682180] [2020-10-12 15:40:05,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:05,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:05,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048247278] [2020-10-12 15:40:05,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:05,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:05,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:05,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:05,342 INFO L87 Difference]: Start difference. First operand 357 states and 472 transitions. Second operand 14 states. [2020-10-12 15:40:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:06,619 INFO L93 Difference]: Finished difference Result 490 states and 666 transitions. [2020-10-12 15:40:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:40:06,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:40:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:06,624 INFO L225 Difference]: With dead ends: 490 [2020-10-12 15:40:06,624 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 15:40:06,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 15:40:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 363. [2020-10-12 15:40:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-10-12 15:40:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 479 transitions. [2020-10-12 15:40:06,659 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 479 transitions. Word has length 42 [2020-10-12 15:40:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:06,659 INFO L479 AbstractCegarLoop]: Abstraction has 363 states and 479 transitions. [2020-10-12 15:40:06,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 479 transitions. [2020-10-12 15:40:06,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:06,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:06,661 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:06,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 15:40:06,661 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1369497273, now seen corresponding path program 5 times [2020-10-12 15:40:06,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:06,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314961228] [2020-10-12 15:40:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:06,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:07,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:07,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:07,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:07,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-12 15:40:07,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:07,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:07,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:07,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:07,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:07,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:07,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:07,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:07,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:07,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314961228] [2020-10-12 15:40:07,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:07,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:07,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687102719] [2020-10-12 15:40:07,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:07,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:07,808 INFO L87 Difference]: Start difference. First operand 363 states and 479 transitions. Second operand 14 states. [2020-10-12 15:40:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:08,969 INFO L93 Difference]: Finished difference Result 377 states and 495 transitions. [2020-10-12 15:40:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:08,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:40:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:08,972 INFO L225 Difference]: With dead ends: 377 [2020-10-12 15:40:08,973 INFO L226 Difference]: Without dead ends: 375 [2020-10-12 15:40:08,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-12 15:40:09,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 354. [2020-10-12 15:40:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-12 15:40:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 468 transitions. [2020-10-12 15:40:09,008 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 468 transitions. Word has length 42 [2020-10-12 15:40:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:09,009 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 468 transitions. [2020-10-12 15:40:09,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 468 transitions. [2020-10-12 15:40:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:09,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:09,010 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:09,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 15:40:09,010 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:09,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1570404409, now seen corresponding path program 6 times [2020-10-12 15:40:09,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:09,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859274500] [2020-10-12 15:40:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:09,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:09,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 532 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:09,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:10,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:10,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:10,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:10,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:10,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859274500] [2020-10-12 15:40:10,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:10,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:10,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748516081] [2020-10-12 15:40:10,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:10,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:10,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:10,304 INFO L87 Difference]: Start difference. First operand 354 states and 468 transitions. Second operand 14 states. [2020-10-12 15:40:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:11,875 INFO L93 Difference]: Finished difference Result 439 states and 574 transitions. [2020-10-12 15:40:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:40:11,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:40:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:11,878 INFO L225 Difference]: With dead ends: 439 [2020-10-12 15:40:11,879 INFO L226 Difference]: Without dead ends: 437 [2020-10-12 15:40:11,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:40:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-12 15:40:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 397. [2020-10-12 15:40:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-12 15:40:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 524 transitions. [2020-10-12 15:40:11,919 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 524 transitions. Word has length 42 [2020-10-12 15:40:11,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:11,919 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 524 transitions. [2020-10-12 15:40:11,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 524 transitions. [2020-10-12 15:40:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:40:11,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:11,920 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:11,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 15:40:11,921 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1627662711, now seen corresponding path program 6 times [2020-10-12 15:40:11,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:11,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814395853] [2020-10-12 15:40:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:12,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:12,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:12,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:40:12,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:12,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-12 15:40:12,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:12,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:12,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:12,712 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-12 15:40:13,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:13,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:13,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:13,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814395853] [2020-10-12 15:40:13,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:13,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:13,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307972099] [2020-10-12 15:40:13,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:13,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:13,196 INFO L87 Difference]: Start difference. First operand 397 states and 524 transitions. Second operand 14 states. [2020-10-12 15:40:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:14,582 INFO L93 Difference]: Finished difference Result 421 states and 552 transitions. [2020-10-12 15:40:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:40:14,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-12 15:40:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:14,585 INFO L225 Difference]: With dead ends: 421 [2020-10-12 15:40:14,585 INFO L226 Difference]: Without dead ends: 419 [2020-10-12 15:40:14,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-12 15:40:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 378. [2020-10-12 15:40:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-10-12 15:40:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 500 transitions. [2020-10-12 15:40:14,619 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 500 transitions. Word has length 42 [2020-10-12 15:40:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:14,619 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 500 transitions. [2020-10-12 15:40:14,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 500 transitions. [2020-10-12 15:40:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:14,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:14,621 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:14,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 15:40:14,621 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1077037003, now seen corresponding path program 3 times [2020-10-12 15:40:14,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:14,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175672974] [2020-10-12 15:40:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:14,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:14,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:14,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:14,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:14,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-12 15:40:14,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:14,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:14,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:14,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:15,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:15,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:15,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:15,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:15,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:40:15,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175672974] [2020-10-12 15:40:15,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:15,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:40:15,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091957756] [2020-10-12 15:40:15,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:40:15,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:40:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:40:15,469 INFO L87 Difference]: Start difference. First operand 378 states and 500 transitions. Second operand 11 states. [2020-10-12 15:40:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:15,804 INFO L93 Difference]: Finished difference Result 518 states and 699 transitions. [2020-10-12 15:40:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:40:15,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-12 15:40:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:15,807 INFO L225 Difference]: With dead ends: 518 [2020-10-12 15:40:15,807 INFO L226 Difference]: Without dead ends: 356 [2020-10-12 15:40:15,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:40:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-12 15:40:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2020-10-12 15:40:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-12 15:40:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 474 transitions. [2020-10-12 15:40:15,843 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 474 transitions. Word has length 44 [2020-10-12 15:40:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:15,843 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 474 transitions. [2020-10-12 15:40:15,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:40:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 474 transitions. [2020-10-12 15:40:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:15,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:15,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:15,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 15:40:15,846 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 131561182, now seen corresponding path program 9 times [2020-10-12 15:40:15,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:15,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341299253] [2020-10-12 15:40:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:15,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:16,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:16,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 664 [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:16,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:16,938 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-12 15:40:17,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:17,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:17,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:17,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:17,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341299253] [2020-10-12 15:40:17,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:17,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:17,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682013214] [2020-10-12 15:40:17,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:17,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:17,317 INFO L87 Difference]: Start difference. First operand 356 states and 474 transitions. Second operand 15 states. [2020-10-12 15:40:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:18,471 INFO L93 Difference]: Finished difference Result 392 states and 519 transitions. [2020-10-12 15:40:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:40:18,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:18,473 INFO L225 Difference]: With dead ends: 392 [2020-10-12 15:40:18,474 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 15:40:18,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:18,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 15:40:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 380. [2020-10-12 15:40:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-12 15:40:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 505 transitions. [2020-10-12 15:40:18,509 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 505 transitions. Word has length 44 [2020-10-12 15:40:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:18,510 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 505 transitions. [2020-10-12 15:40:18,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 505 transitions. [2020-10-12 15:40:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:18,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:18,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:18,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 15:40:18,513 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash 131563104, now seen corresponding path program 7 times [2020-10-12 15:40:18,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:18,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725399321] [2020-10-12 15:40:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:18,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:19,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:19,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:19,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:19,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-12 15:40:19,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:19,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:19,710 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-12 15:40:19,872 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-12 15:40:20,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:20,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:20,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:20,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:20,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:20,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725399321] [2020-10-12 15:40:20,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:20,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:20,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32253827] [2020-10-12 15:40:20,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:20,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:20,264 INFO L87 Difference]: Start difference. First operand 380 states and 505 transitions. Second operand 15 states. [2020-10-12 15:40:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:21,713 INFO L93 Difference]: Finished difference Result 555 states and 757 transitions. [2020-10-12 15:40:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:40:21,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:21,718 INFO L225 Difference]: With dead ends: 555 [2020-10-12 15:40:21,719 INFO L226 Difference]: Without dead ends: 455 [2020-10-12 15:40:21,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:40:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-12 15:40:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 419. [2020-10-12 15:40:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-12 15:40:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 556 transitions. [2020-10-12 15:40:21,749 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 556 transitions. Word has length 44 [2020-10-12 15:40:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:21,749 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 556 transitions. [2020-10-12 15:40:21,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 556 transitions. [2020-10-12 15:40:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:21,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:21,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:21,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 15:40:21,751 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:21,751 INFO L82 PathProgramCache]: Analyzing trace with hash 188819484, now seen corresponding path program 7 times [2020-10-12 15:40:21,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:21,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524213309] [2020-10-12 15:40:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:21,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:22,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:22,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:22,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:22,495 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-12 15:40:22,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:22,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:22,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:22,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:22,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:22,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:22,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:22,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524213309] [2020-10-12 15:40:22,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:22,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:22,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104017950] [2020-10-12 15:40:22,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:22,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:22,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:22,999 INFO L87 Difference]: Start difference. First operand 419 states and 556 transitions. Second operand 15 states. [2020-10-12 15:40:23,594 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:40:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:24,313 INFO L93 Difference]: Finished difference Result 435 states and 575 transitions. [2020-10-12 15:40:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:24,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:24,316 INFO L225 Difference]: With dead ends: 435 [2020-10-12 15:40:24,316 INFO L226 Difference]: Without dead ends: 433 [2020-10-12 15:40:24,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-12 15:40:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 421. [2020-10-12 15:40:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-12 15:40:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 559 transitions. [2020-10-12 15:40:24,354 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 559 transitions. Word has length 44 [2020-10-12 15:40:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:24,354 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 559 transitions. [2020-10-12 15:40:24,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 559 transitions. [2020-10-12 15:40:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:24,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:24,356 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:24,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 15:40:24,356 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash 389726620, now seen corresponding path program 8 times [2020-10-12 15:40:24,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:24,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242010821] [2020-10-12 15:40:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:25,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:25,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:25,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:25,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-12 15:40:25,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:25,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:40:26,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:26,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:26,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:26,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:26,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:26,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:40:26,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:26,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:26,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:26,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:26,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:40:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:26,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242010821] [2020-10-12 15:40:26,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:26,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:26,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114891214] [2020-10-12 15:40:26,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:26,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:26,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:26,197 INFO L87 Difference]: Start difference. First operand 421 states and 559 transitions. Second operand 15 states. [2020-10-12 15:40:26,752 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-12 15:40:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:27,429 INFO L93 Difference]: Finished difference Result 435 states and 575 transitions. [2020-10-12 15:40:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:27,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:27,435 INFO L225 Difference]: With dead ends: 435 [2020-10-12 15:40:27,436 INFO L226 Difference]: Without dead ends: 433 [2020-10-12 15:40:27,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-12 15:40:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 418. [2020-10-12 15:40:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-12 15:40:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 555 transitions. [2020-10-12 15:40:27,468 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 555 transitions. Word has length 44 [2020-10-12 15:40:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:27,469 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 555 transitions. [2020-10-12 15:40:27,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 555 transitions. [2020-10-12 15:40:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:27,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:27,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:27,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 15:40:27,470 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:27,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash 446984922, now seen corresponding path program 9 times [2020-10-12 15:40:27,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:27,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177722438] [2020-10-12 15:40:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:27,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:28,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:28,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:28,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:28,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:28,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:28,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177722438] [2020-10-12 15:40:28,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:28,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:28,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225807430] [2020-10-12 15:40:28,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:28,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:28,648 INFO L87 Difference]: Start difference. First operand 418 states and 555 transitions. Second operand 15 states. [2020-10-12 15:40:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:29,875 INFO L93 Difference]: Finished difference Result 439 states and 579 transitions. [2020-10-12 15:40:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:40:29,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:29,877 INFO L225 Difference]: With dead ends: 439 [2020-10-12 15:40:29,877 INFO L226 Difference]: Without dead ends: 437 [2020-10-12 15:40:29,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:40:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-12 15:40:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 419. [2020-10-12 15:40:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-12 15:40:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 556 transitions. [2020-10-12 15:40:29,910 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 556 transitions. Word has length 44 [2020-10-12 15:40:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:29,910 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 556 transitions. [2020-10-12 15:40:29,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 556 transitions. [2020-10-12 15:40:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:29,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:29,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:29,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 15:40:29,912 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1862583524, now seen corresponding path program 10 times [2020-10-12 15:40:29,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:29,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758597887] [2020-10-12 15:40:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:29,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:30,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:30,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:30,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:31,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:31,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758597887] [2020-10-12 15:40:31,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:31,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:31,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557786460] [2020-10-12 15:40:31,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:31,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:31,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:31,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:31,276 INFO L87 Difference]: Start difference. First operand 419 states and 556 transitions. Second operand 15 states. [2020-10-12 15:40:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:32,490 INFO L93 Difference]: Finished difference Result 434 states and 573 transitions. [2020-10-12 15:40:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:40:32,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:32,493 INFO L225 Difference]: With dead ends: 434 [2020-10-12 15:40:32,493 INFO L226 Difference]: Without dead ends: 432 [2020-10-12 15:40:32,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:32,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-12 15:40:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 420. [2020-10-12 15:40:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-12 15:40:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 557 transitions. [2020-10-12 15:40:32,519 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 557 transitions. Word has length 44 [2020-10-12 15:40:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:32,520 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 557 transitions. [2020-10-12 15:40:32,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 557 transitions. [2020-10-12 15:40:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:32,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:32,521 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:32,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 15:40:32,521 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1805325222, now seen corresponding path program 11 times [2020-10-12 15:40:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:32,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280764418] [2020-10-12 15:40:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:33,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:33,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:33,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:33,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-12 15:40:33,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:33,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:33,511 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-12 15:40:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:34,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:34,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:34,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:34,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:34,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280764418] [2020-10-12 15:40:34,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:34,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:34,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705366349] [2020-10-12 15:40:34,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:34,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:34,100 INFO L87 Difference]: Start difference. First operand 420 states and 557 transitions. Second operand 15 states. [2020-10-12 15:40:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:35,454 INFO L93 Difference]: Finished difference Result 539 states and 713 transitions. [2020-10-12 15:40:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:40:35,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:35,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:35,458 INFO L225 Difference]: With dead ends: 539 [2020-10-12 15:40:35,458 INFO L226 Difference]: Without dead ends: 537 [2020-10-12 15:40:35,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:40:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-10-12 15:40:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 487. [2020-10-12 15:40:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-10-12 15:40:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 653 transitions. [2020-10-12 15:40:35,492 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 653 transitions. Word has length 44 [2020-10-12 15:40:35,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:35,492 INFO L479 AbstractCegarLoop]: Abstraction has 487 states and 653 transitions. [2020-10-12 15:40:35,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 653 transitions. [2020-10-12 15:40:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:35,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:35,493 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:35,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 15:40:35,494 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:35,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1604418086, now seen corresponding path program 12 times [2020-10-12 15:40:35,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:35,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275486015] [2020-10-12 15:40:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:35,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:36,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:36,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:36,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:36,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-12 15:40:36,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:36,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:36,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:36,669 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-12 15:40:37,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:37,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:37,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:37,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:37,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:37,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:37,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:37,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:37,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:37,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275486015] [2020-10-12 15:40:37,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:37,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:37,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436424057] [2020-10-12 15:40:37,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:37,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:37,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:37,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:37,055 INFO L87 Difference]: Start difference. First operand 487 states and 653 transitions. Second operand 15 states. [2020-10-12 15:40:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:38,322 INFO L93 Difference]: Finished difference Result 566 states and 758 transitions. [2020-10-12 15:40:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:40:38,323 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:38,326 INFO L225 Difference]: With dead ends: 566 [2020-10-12 15:40:38,326 INFO L226 Difference]: Without dead ends: 564 [2020-10-12 15:40:38,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-10-12 15:40:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 496. [2020-10-12 15:40:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-10-12 15:40:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 669 transitions. [2020-10-12 15:40:38,355 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 669 transitions. Word has length 44 [2020-10-12 15:40:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:38,356 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 669 transitions. [2020-10-12 15:40:38,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 669 transitions. [2020-10-12 15:40:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:40:38,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:38,357 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:38,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 15:40:38,357 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1547159784, now seen corresponding path program 7 times [2020-10-12 15:40:38,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:38,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503914399] [2020-10-12 15:40:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:39,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:40:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:39,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:39,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:39,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:39,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:39,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:39,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503914399] [2020-10-12 15:40:39,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:39,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:40:39,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609694245] [2020-10-12 15:40:39,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:40:39,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:40:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:40:39,938 INFO L87 Difference]: Start difference. First operand 496 states and 669 transitions. Second operand 15 states. [2020-10-12 15:40:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:41,368 INFO L93 Difference]: Finished difference Result 568 states and 758 transitions. [2020-10-12 15:40:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:40:41,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-12 15:40:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:41,373 INFO L225 Difference]: With dead ends: 568 [2020-10-12 15:40:41,373 INFO L226 Difference]: Without dead ends: 566 [2020-10-12 15:40:41,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-10-12 15:40:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 491. [2020-10-12 15:40:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-12 15:40:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 661 transitions. [2020-10-12 15:40:41,407 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 661 transitions. Word has length 44 [2020-10-12 15:40:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:41,408 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 661 transitions. [2020-10-12 15:40:41,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:40:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 661 transitions. [2020-10-12 15:40:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:40:41,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:41,409 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:41,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 15:40:41,410 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1169922712, now seen corresponding path program 4 times [2020-10-12 15:40:41,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:41,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555743302] [2020-10-12 15:40:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:41,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:41,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:42,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:40:42,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:42,530 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-12 15:40:42,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:42,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:42,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:42,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:42,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:42,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:42,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:42,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:42,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:42,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:42,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:40:42,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555743302] [2020-10-12 15:40:42,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:42,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:40:42,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558286378] [2020-10-12 15:40:42,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:40:42,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:40:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:40:42,813 INFO L87 Difference]: Start difference. First operand 491 states and 661 transitions. Second operand 13 states. [2020-10-12 15:40:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:43,513 INFO L93 Difference]: Finished difference Result 547 states and 738 transitions. [2020-10-12 15:40:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:40:43,514 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-12 15:40:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:43,516 INFO L225 Difference]: With dead ends: 547 [2020-10-12 15:40:43,516 INFO L226 Difference]: Without dead ends: 545 [2020-10-12 15:40:43,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:40:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-12 15:40:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 433. [2020-10-12 15:40:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-12 15:40:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 583 transitions. [2020-10-12 15:40:43,544 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 583 transitions. Word has length 46 [2020-10-12 15:40:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:43,544 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 583 transitions. [2020-10-12 15:40:43,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:40:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 583 transitions. [2020-10-12 15:40:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:40:43,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:43,546 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] [2020-10-12 15:40:43,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 15:40:43,546 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash 158807384, now seen corresponding path program 3 times [2020-10-12 15:40:43,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:43,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288821034] [2020-10-12 15:40:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:43,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:43,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:44,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:44,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:44,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:40:44,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:40:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-12 15:40:44,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:40:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:40:44,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:45,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:45,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:45,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:45,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288821034] [2020-10-12 15:40:45,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:45,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:40:45,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106924807] [2020-10-12 15:40:45,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:40:45,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:40:45,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:40:45,323 INFO L87 Difference]: Start difference. First operand 433 states and 583 transitions. Second operand 14 states. [2020-10-12 15:40:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:46,601 INFO L93 Difference]: Finished difference Result 720 states and 975 transitions. [2020-10-12 15:40:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:40:46,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-12 15:40:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:46,604 INFO L225 Difference]: With dead ends: 720 [2020-10-12 15:40:46,604 INFO L226 Difference]: Without dead ends: 541 [2020-10-12 15:40:46,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:40:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-12 15:40:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 377. [2020-10-12 15:40:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-12 15:40:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 510 transitions. [2020-10-12 15:40:46,636 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 510 transitions. Word has length 46 [2020-10-12 15:40:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:46,636 INFO L479 AbstractCegarLoop]: Abstraction has 377 states and 510 transitions. [2020-10-12 15:40:46,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:40:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 510 transitions. [2020-10-12 15:40:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:40:46,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:46,637 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:40:46,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 15:40:46,637 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash -11909932, now seen corresponding path program 3 times [2020-10-12 15:40:46,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:46,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558182588] [2020-10-12 15:40:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:46,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:46,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:48,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:50,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:50,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:51,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:51,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:51,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:40:51,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:40:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 15:40:51,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:40:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:40:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:52,320 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-12 15:40:52,510 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-12 15:40:52,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:52,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:52,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:52,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:52,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:52,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:52,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:52,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:52,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:52,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:52,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558182588] [2020-10-12 15:40:52,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:52,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:40:52,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167125471] [2020-10-12 15:40:52,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:40:52,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:40:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:40:52,781 INFO L87 Difference]: Start difference. First operand 377 states and 510 transitions. Second operand 17 states. [2020-10-12 15:40:53,454 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-10-12 15:40:53,906 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-12 15:40:54,098 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-12 15:40:54,334 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-12 15:40:54,823 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-12 15:40:55,158 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 15:40:55,441 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-12 15:40:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:40:55,600 INFO L93 Difference]: Finished difference Result 467 states and 620 transitions. [2020-10-12 15:40:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:40:55,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-12 15:40:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:40:55,604 INFO L225 Difference]: With dead ends: 467 [2020-10-12 15:40:55,604 INFO L226 Difference]: Without dead ends: 465 [2020-10-12 15:40:55,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=231, Invalid=825, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:40:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-12 15:40:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 379. [2020-10-12 15:40:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 15:40:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 512 transitions. [2020-10-12 15:40:55,639 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 512 transitions. Word has length 46 [2020-10-12 15:40:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:40:55,639 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 512 transitions. [2020-10-12 15:40:55,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:40:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 512 transitions. [2020-10-12 15:40:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:40:55,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:40:55,640 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] [2020-10-12 15:40:55,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 15:40:55,641 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:40:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:40:55,641 INFO L82 PathProgramCache]: Analyzing trace with hash 990907416, now seen corresponding path program 4 times [2020-10-12 15:40:55,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:40:55,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119233832] [2020-10-12 15:40:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:40:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:55,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:55,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:55,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:56,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:57,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:58,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:58,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:40:58,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:40:58,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2770 [2020-10-12 15:40:58,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:58,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:40:58,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:40:58,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:40:58,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:58,760 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-12 15:40:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:40:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:40:59,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:40:59,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:40:59,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:40:59,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:40:59,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:40:59,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:40:59,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:40:59,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:40:59,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:40:59,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:40:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:40:59,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119233832] [2020-10-12 15:40:59,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:40:59,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:40:59,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266140188] [2020-10-12 15:40:59,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:40:59,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:40:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:40:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:40:59,080 INFO L87 Difference]: Start difference. First operand 379 states and 512 transitions. Second operand 13 states. [2020-10-12 15:41:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:00,110 INFO L93 Difference]: Finished difference Result 549 states and 758 transitions. [2020-10-12 15:41:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:41:00,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-12 15:41:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:00,113 INFO L225 Difference]: With dead ends: 549 [2020-10-12 15:41:00,113 INFO L226 Difference]: Without dead ends: 407 [2020-10-12 15:41:00,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-12 15:41:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 379. [2020-10-12 15:41:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-12 15:41:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 506 transitions. [2020-10-12 15:41:00,139 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 506 transitions. Word has length 46 [2020-10-12 15:41:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:00,139 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 506 transitions. [2020-10-12 15:41:00,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:41:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 506 transitions. [2020-10-12 15:41:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:00,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:00,140 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:00,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 15:41:00,141 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash 787010749, now seen corresponding path program 4 times [2020-10-12 15:41:00,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:00,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152957024] [2020-10-12 15:41:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:00,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:00,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:00,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:01,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:01,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:01,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:41:01,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-12 15:41:01,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:01,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:01,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:01,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:01,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:02,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:02,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:02,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:02,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:02,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:02,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:02,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:02,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:02,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:41:02,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152957024] [2020-10-12 15:41:02,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:02,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:41:02,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879639112] [2020-10-12 15:41:02,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:41:02,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:41:02,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:41:02,840 INFO L87 Difference]: Start difference. First operand 379 states and 506 transitions. Second operand 14 states. [2020-10-12 15:41:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:03,699 INFO L93 Difference]: Finished difference Result 487 states and 652 transitions. [2020-10-12 15:41:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:41:03,700 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-12 15:41:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:03,701 INFO L225 Difference]: With dead ends: 487 [2020-10-12 15:41:03,702 INFO L226 Difference]: Without dead ends: 447 [2020-10-12 15:41:03,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:41:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-12 15:41:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 428. [2020-10-12 15:41:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-12 15:41:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 566 transitions. [2020-10-12 15:41:03,732 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 566 transitions. Word has length 48 [2020-10-12 15:41:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:03,733 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 566 transitions. [2020-10-12 15:41:03,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:41:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 566 transitions. [2020-10-12 15:41:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:03,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:03,734 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:03,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 15:41:03,734 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash 844267129, now seen corresponding path program 4 times [2020-10-12 15:41:03,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:03,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122089949] [2020-10-12 15:41:03,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:03,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:03,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:04,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:04,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:04,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:04,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-12 15:41:04,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:04,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:04,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:04,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:04,858 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-12 15:41:05,062 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-12 15:41:05,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:05,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:05,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:05,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:05,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:05,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:05,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:05,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:05,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:05,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:41:05,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122089949] [2020-10-12 15:41:05,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:05,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:41:05,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451200941] [2020-10-12 15:41:05,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:41:05,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:41:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:41:05,531 INFO L87 Difference]: Start difference. First operand 428 states and 566 transitions. Second operand 14 states. [2020-10-12 15:41:06,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:06,280 INFO L93 Difference]: Finished difference Result 447 states and 590 transitions. [2020-10-12 15:41:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:41:06,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-12 15:41:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:06,289 INFO L225 Difference]: With dead ends: 447 [2020-10-12 15:41:06,289 INFO L226 Difference]: Without dead ends: 445 [2020-10-12 15:41:06,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:41:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-12 15:41:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 401. [2020-10-12 15:41:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-12 15:41:06,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 533 transitions. [2020-10-12 15:41:06,321 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 533 transitions. Word has length 48 [2020-10-12 15:41:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:06,322 INFO L479 AbstractCegarLoop]: Abstraction has 401 states and 533 transitions. [2020-10-12 15:41:06,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:41:06,322 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 533 transitions. [2020-10-12 15:41:06,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:06,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:06,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:06,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 15:41:06,323 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1136223621, now seen corresponding path program 5 times [2020-10-12 15:41:06,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:06,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470498806] [2020-10-12 15:41:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:06,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:06,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-12 15:41:06,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:07,283 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-12 15:41:07,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:07,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:07,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:07,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:07,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470498806] [2020-10-12 15:41:07,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:07,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:41:07,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400363512] [2020-10-12 15:41:07,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:41:07,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:41:07,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:41:07,720 INFO L87 Difference]: Start difference. First operand 401 states and 533 transitions. Second operand 15 states. [2020-10-12 15:41:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:08,909 INFO L93 Difference]: Finished difference Result 500 states and 664 transitions. [2020-10-12 15:41:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:41:08,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-10-12 15:41:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:08,913 INFO L225 Difference]: With dead ends: 500 [2020-10-12 15:41:08,913 INFO L226 Difference]: Without dead ends: 498 [2020-10-12 15:41:08,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:41:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-12 15:41:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 477. [2020-10-12 15:41:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-12 15:41:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 635 transitions. [2020-10-12 15:41:08,955 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 635 transitions. Word has length 48 [2020-10-12 15:41:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:08,955 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 635 transitions. [2020-10-12 15:41:08,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:41:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 635 transitions. [2020-10-12 15:41:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:08,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:08,957 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:08,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 15:41:08,957 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1136221699, now seen corresponding path program 5 times [2020-10-12 15:41:08,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:08,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541404402] [2020-10-12 15:41:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:09,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:09,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:10,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:10,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:10,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-12 15:41:10,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:10,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:10,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:10,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:10,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:10,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:10,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:10,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:10,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:10,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:10,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:10,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541404402] [2020-10-12 15:41:10,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:10,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:10,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22565930] [2020-10-12 15:41:10,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:10,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:10,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:10,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:10,652 INFO L87 Difference]: Start difference. First operand 477 states and 635 transitions. Second operand 16 states. [2020-10-12 15:41:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:11,754 INFO L93 Difference]: Finished difference Result 631 states and 851 transitions. [2020-10-12 15:41:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:41:11,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:11,756 INFO L225 Difference]: With dead ends: 631 [2020-10-12 15:41:11,757 INFO L226 Difference]: Without dead ends: 549 [2020-10-12 15:41:11,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2020-10-12 15:41:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 527. [2020-10-12 15:41:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-12 15:41:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 702 transitions. [2020-10-12 15:41:11,808 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 702 transitions. Word has length 48 [2020-10-12 15:41:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:11,809 INFO L479 AbstractCegarLoop]: Abstraction has 527 states and 702 transitions. [2020-10-12 15:41:11,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 702 transitions. [2020-10-12 15:41:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:11,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:11,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:11,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 15:41:11,810 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:11,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1953872071, now seen corresponding path program 5 times [2020-10-12 15:41:11,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:11,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581967012] [2020-10-12 15:41:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:12,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:12,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:12,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:13,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:13,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:13,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:13,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:13,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581967012] [2020-10-12 15:41:13,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:13,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:13,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989804182] [2020-10-12 15:41:13,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:13,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:13,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:13,582 INFO L87 Difference]: Start difference. First operand 527 states and 702 transitions. Second operand 16 states. [2020-10-12 15:41:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:15,090 INFO L93 Difference]: Finished difference Result 599 states and 796 transitions. [2020-10-12 15:41:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:41:15,091 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:15,094 INFO L225 Difference]: With dead ends: 599 [2020-10-12 15:41:15,095 INFO L226 Difference]: Without dead ends: 597 [2020-10-12 15:41:15,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:41:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2020-10-12 15:41:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 555. [2020-10-12 15:41:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-12 15:41:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 738 transitions. [2020-10-12 15:41:15,143 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 738 transitions. Word has length 48 [2020-10-12 15:41:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:15,143 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 738 transitions. [2020-10-12 15:41:15,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 738 transitions. [2020-10-12 15:41:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:15,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:15,146 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:15,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 15:41:15,146 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1896613769, now seen corresponding path program 6 times [2020-10-12 15:41:15,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:15,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881966664] [2020-10-12 15:41:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:15,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:15,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:16,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:16,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:16,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-12 15:41:16,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:16,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:16,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:17,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:17,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:17,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:17,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:17,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:17,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:17,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:17,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:17,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881966664] [2020-10-12 15:41:17,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:17,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:17,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955113261] [2020-10-12 15:41:17,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:17,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:17,053 INFO L87 Difference]: Start difference. First operand 555 states and 738 transitions. Second operand 16 states. [2020-10-12 15:41:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:18,507 INFO L93 Difference]: Finished difference Result 613 states and 812 transitions. [2020-10-12 15:41:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:41:18,509 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:18,511 INFO L225 Difference]: With dead ends: 613 [2020-10-12 15:41:18,511 INFO L226 Difference]: Without dead ends: 611 [2020-10-12 15:41:18,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:41:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-10-12 15:41:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 559. [2020-10-12 15:41:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-10-12 15:41:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 742 transitions. [2020-10-12 15:41:18,552 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 742 transitions. Word has length 48 [2020-10-12 15:41:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:18,552 INFO L479 AbstractCegarLoop]: Abstraction has 559 states and 742 transitions. [2020-10-12 15:41:18,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 742 transitions. [2020-10-12 15:41:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:18,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:18,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:18,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 15:41:18,553 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1329977975, now seen corresponding path program 7 times [2020-10-12 15:41:18,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:18,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839339504] [2020-10-12 15:41:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:19,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:19,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:19,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:19,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-12 15:41:19,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:41:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:19,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:19,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:19,827 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-12 15:41:20,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:20,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:20,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:20,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:20,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:20,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:20,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:20,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:20,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839339504] [2020-10-12 15:41:20,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:20,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:20,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097690707] [2020-10-12 15:41:20,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:20,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:20,470 INFO L87 Difference]: Start difference. First operand 559 states and 742 transitions. Second operand 16 states. [2020-10-12 15:41:21,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:21,454 INFO L93 Difference]: Finished difference Result 581 states and 769 transitions. [2020-10-12 15:41:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:41:21,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:21,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:21,457 INFO L225 Difference]: With dead ends: 581 [2020-10-12 15:41:21,458 INFO L226 Difference]: Without dead ends: 579 [2020-10-12 15:41:21,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:41:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-10-12 15:41:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 453. [2020-10-12 15:41:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 15:41:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 604 transitions. [2020-10-12 15:41:21,490 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 604 transitions. Word has length 48 [2020-10-12 15:41:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:21,490 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 604 transitions. [2020-10-12 15:41:21,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 604 transitions. [2020-10-12 15:41:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:21,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:21,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:21,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 15:41:21,492 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1995607012, now seen corresponding path program 10 times [2020-10-12 15:41:21,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:21,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808314541] [2020-10-12 15:41:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:22,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:22,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:22,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:22,670 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-12 15:41:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:23,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:23,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:23,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:23,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:23,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:23,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:23,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808314541] [2020-10-12 15:41:23,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:23,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:23,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071715] [2020-10-12 15:41:23,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:23,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:23,286 INFO L87 Difference]: Start difference. First operand 453 states and 604 transitions. Second operand 16 states. [2020-10-12 15:41:24,073 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-12 15:41:24,538 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-12 15:41:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:25,284 INFO L93 Difference]: Finished difference Result 492 states and 652 transitions. [2020-10-12 15:41:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:41:25,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:25,287 INFO L225 Difference]: With dead ends: 492 [2020-10-12 15:41:25,287 INFO L226 Difference]: Without dead ends: 490 [2020-10-12 15:41:25,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-12 15:41:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 477. [2020-10-12 15:41:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-12 15:41:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 635 transitions. [2020-10-12 15:41:25,323 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 635 transitions. Word has length 48 [2020-10-12 15:41:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:25,323 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 635 transitions. [2020-10-12 15:41:25,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 635 transitions. [2020-10-12 15:41:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:25,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:25,324 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:25,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 15:41:25,324 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1995608934, now seen corresponding path program 8 times [2020-10-12 15:41:25,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:25,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286579679] [2020-10-12 15:41:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:25,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:25,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:26,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:26,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:41:26,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:26,914 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-12 15:41:27,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:27,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:27,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:27,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:27,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:41:27,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:27,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:27,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:27,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:27,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286579679] [2020-10-12 15:41:27,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:27,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:27,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489086071] [2020-10-12 15:41:27,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:27,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:27,503 INFO L87 Difference]: Start difference. First operand 477 states and 635 transitions. Second operand 16 states. [2020-10-12 15:41:28,242 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-12 15:41:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:29,344 INFO L93 Difference]: Finished difference Result 658 states and 893 transitions. [2020-10-12 15:41:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:41:29,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:29,347 INFO L225 Difference]: With dead ends: 658 [2020-10-12 15:41:29,347 INFO L226 Difference]: Without dead ends: 558 [2020-10-12 15:41:29,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:41:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-10-12 15:41:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 516. [2020-10-12 15:41:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-12 15:41:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 686 transitions. [2020-10-12 15:41:29,383 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 686 transitions. Word has length 48 [2020-10-12 15:41:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:29,383 INFO L479 AbstractCegarLoop]: Abstraction has 516 states and 686 transitions. [2020-10-12 15:41:29,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 686 transitions. [2020-10-12 15:41:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:29,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:29,384 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:29,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 15:41:29,385 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2052865314, now seen corresponding path program 13 times [2020-10-12 15:41:29,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:29,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576026032] [2020-10-12 15:41:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:29,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:30,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:30,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:30,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:30,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1196 [2020-10-12 15:41:30,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:30,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:30,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:30,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:41:31,142 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-12 15:41:31,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:31,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:31,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:31,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:31,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:31,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576026032] [2020-10-12 15:41:31,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:31,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:31,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081418675] [2020-10-12 15:41:31,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:31,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:31,796 INFO L87 Difference]: Start difference. First operand 516 states and 686 transitions. Second operand 16 states. [2020-10-12 15:41:32,687 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-12 15:41:33,131 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:41:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:33,877 INFO L93 Difference]: Finished difference Result 537 states and 710 transitions. [2020-10-12 15:41:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:41:33,878 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:33,880 INFO L225 Difference]: With dead ends: 537 [2020-10-12 15:41:33,880 INFO L226 Difference]: Without dead ends: 535 [2020-10-12 15:41:33,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-12 15:41:33,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 518. [2020-10-12 15:41:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-10-12 15:41:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 689 transitions. [2020-10-12 15:41:33,928 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 689 transitions. Word has length 48 [2020-10-12 15:41:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:33,928 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 689 transitions. [2020-10-12 15:41:33,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 689 transitions. [2020-10-12 15:41:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:33,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:33,929 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:33,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 15:41:33,930 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:33,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:33,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2041194846, now seen corresponding path program 14 times [2020-10-12 15:41:33,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:33,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746474041] [2020-10-12 15:41:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:34,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:35,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:35,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:35,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:35,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-12 15:41:35,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:35,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:35,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:35,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:35,718 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-12 15:41:36,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:36,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:36,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:36,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:36,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:36,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:36,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:36,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:36,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:36,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746474041] [2020-10-12 15:41:36,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:36,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:36,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595798371] [2020-10-12 15:41:36,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:36,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:36,305 INFO L87 Difference]: Start difference. First operand 518 states and 689 transitions. Second operand 16 states. [2020-10-12 15:41:37,049 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-12 15:41:37,458 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:41:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:38,187 INFO L93 Difference]: Finished difference Result 537 states and 710 transitions. [2020-10-12 15:41:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:41:38,189 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:38,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:38,191 INFO L225 Difference]: With dead ends: 537 [2020-10-12 15:41:38,191 INFO L226 Difference]: Without dead ends: 535 [2020-10-12 15:41:38,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-12 15:41:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 515. [2020-10-12 15:41:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-12 15:41:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 685 transitions. [2020-10-12 15:41:38,228 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 685 transitions. Word has length 48 [2020-10-12 15:41:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:38,228 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 685 transitions. [2020-10-12 15:41:38,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 685 transitions. [2020-10-12 15:41:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:38,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:38,229 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:38,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 15:41:38,229 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1983936544, now seen corresponding path program 15 times [2020-10-12 15:41:38,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:38,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844517077] [2020-10-12 15:41:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:38,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:38,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:38,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:38,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:38,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-12 15:41:38,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:38,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:38,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:38,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:38,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:39,509 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-12 15:41:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:40,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:40,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:40,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:40,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:40,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:40,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:40,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844517077] [2020-10-12 15:41:40,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:40,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:40,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039684834] [2020-10-12 15:41:40,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:40,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:40,279 INFO L87 Difference]: Start difference. First operand 515 states and 685 transitions. Second operand 16 states. [2020-10-12 15:41:41,228 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-10-12 15:41:41,700 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:41:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:42,505 INFO L93 Difference]: Finished difference Result 537 states and 710 transitions. [2020-10-12 15:41:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:41:42,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:42,508 INFO L225 Difference]: With dead ends: 537 [2020-10-12 15:41:42,508 INFO L226 Difference]: Without dead ends: 535 [2020-10-12 15:41:42,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:41:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2020-10-12 15:41:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 514. [2020-10-12 15:41:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-12 15:41:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 684 transitions. [2020-10-12 15:41:42,557 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 684 transitions. Word has length 48 [2020-10-12 15:41:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:42,557 INFO L479 AbstractCegarLoop]: Abstraction has 514 states and 684 transitions. [2020-10-12 15:41:42,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 684 transitions. [2020-10-12 15:41:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:42,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:42,558 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:42,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 15:41:42,559 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:42,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1462306, now seen corresponding path program 16 times [2020-10-12 15:41:42,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:42,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59946506] [2020-10-12 15:41:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:42,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:43,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:43,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:43,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:43,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-12 15:41:43,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:43,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:43,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:43,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:43,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:43,562 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-12 15:41:43,694 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-12 15:41:44,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:44,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:44,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:44,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:44,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:44,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:44,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:44,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:44,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:44,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:44,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:44,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59946506] [2020-10-12 15:41:44,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:44,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:44,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229643683] [2020-10-12 15:41:44,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:44,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:44,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:44,294 INFO L87 Difference]: Start difference. First operand 514 states and 684 transitions. Second operand 16 states. [2020-10-12 15:41:45,500 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-12 15:41:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:46,203 INFO L93 Difference]: Finished difference Result 530 states and 702 transitions. [2020-10-12 15:41:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:41:46,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:46,207 INFO L225 Difference]: With dead ends: 530 [2020-10-12 15:41:46,207 INFO L226 Difference]: Without dead ends: 528 [2020-10-12 15:41:46,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:41:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-10-12 15:41:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 513. [2020-10-12 15:41:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-12 15:41:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 683 transitions. [2020-10-12 15:41:46,250 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 683 transitions. Word has length 48 [2020-10-12 15:41:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:46,251 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 683 transitions. [2020-10-12 15:41:46,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 683 transitions. [2020-10-12 15:41:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:46,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:46,252 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:46,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 15:41:46,252 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash 58720608, now seen corresponding path program 17 times [2020-10-12 15:41:46,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:46,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284693261] [2020-10-12 15:41:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:46,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:46,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:47,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:47,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:47,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:47,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-12 15:41:47,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:47,605 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-12 15:41:47,823 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-12 15:41:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:48,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:48,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:48,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:48,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:48,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:48,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:48,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:48,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284693261] [2020-10-12 15:41:48,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:48,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:48,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489275823] [2020-10-12 15:41:48,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:48,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:48,323 INFO L87 Difference]: Start difference. First operand 513 states and 683 transitions. Second operand 16 states. [2020-10-12 15:41:49,566 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 15:41:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:50,304 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2020-10-12 15:41:50,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:41:50,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:50,307 INFO L225 Difference]: With dead ends: 549 [2020-10-12 15:41:50,307 INFO L226 Difference]: Without dead ends: 547 [2020-10-12 15:41:50,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:41:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-12 15:41:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 515. [2020-10-12 15:41:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-12 15:41:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 686 transitions. [2020-10-12 15:41:50,360 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 686 transitions. Word has length 48 [2020-10-12 15:41:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:50,360 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 686 transitions. [2020-10-12 15:41:50,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 686 transitions. [2020-10-12 15:41:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:50,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:50,361 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:50,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 15:41:50,362 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 259627744, now seen corresponding path program 18 times [2020-10-12 15:41:50,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:50,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927932619] [2020-10-12 15:41:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:50,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:51,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:51,474 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-12 15:41:51,752 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-12 15:41:51,999 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-10-12 15:41:52,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:52,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:52,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:52,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:52,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:52,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:41:52,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:52,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:52,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:52,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:52,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:52,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927932619] [2020-10-12 15:41:52,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:52,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:52,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625005667] [2020-10-12 15:41:52,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:52,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:52,345 INFO L87 Difference]: Start difference. First operand 515 states and 686 transitions. Second operand 16 states. [2020-10-12 15:41:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:55,007 INFO L93 Difference]: Finished difference Result 633 states and 846 transitions. [2020-10-12 15:41:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:41:55,008 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:55,011 INFO L225 Difference]: With dead ends: 633 [2020-10-12 15:41:55,011 INFO L226 Difference]: Without dead ends: 631 [2020-10-12 15:41:55,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:41:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-12 15:41:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 555. [2020-10-12 15:41:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-12 15:41:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 743 transitions. [2020-10-12 15:41:55,051 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 743 transitions. Word has length 48 [2020-10-12 15:41:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:55,052 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 743 transitions. [2020-10-12 15:41:55,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 743 transitions. [2020-10-12 15:41:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:41:55,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:55,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:55,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 15:41:55,054 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash 316886046, now seen corresponding path program 8 times [2020-10-12 15:41:55,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:55,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405306319] [2020-10-12 15:41:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:55,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:55,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:55,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:55,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:41:55,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:56,242 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-12 15:41:56,422 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-12 15:41:56,658 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2020-10-12 15:41:57,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:41:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:41:57,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:41:57,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:41:57,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:41:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:41:57,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405306319] [2020-10-12 15:41:57,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:41:57,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:41:57,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213423809] [2020-10-12 15:41:57,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:41:57,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:41:57,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:41:57,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:41:57,171 INFO L87 Difference]: Start difference. First operand 555 states and 743 transitions. Second operand 16 states. [2020-10-12 15:41:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:41:59,684 INFO L93 Difference]: Finished difference Result 593 states and 787 transitions. [2020-10-12 15:41:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:41:59,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-12 15:41:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:41:59,689 INFO L225 Difference]: With dead ends: 593 [2020-10-12 15:41:59,689 INFO L226 Difference]: Without dead ends: 591 [2020-10-12 15:41:59,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:41:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-10-12 15:41:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 554. [2020-10-12 15:41:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-12 15:41:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 742 transitions. [2020-10-12 15:41:59,736 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 742 transitions. Word has length 48 [2020-10-12 15:41:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:41:59,736 INFO L479 AbstractCegarLoop]: Abstraction has 554 states and 742 transitions. [2020-10-12 15:41:59,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:41:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 742 transitions. [2020-10-12 15:41:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:41:59,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:41:59,737 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:41:59,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 15:41:59,738 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:41:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:41:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1803485433, now seen corresponding path program 11 times [2020-10-12 15:41:59,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:41:59,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776813584] [2020-10-12 15:41:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:41:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:41:59,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:00,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:00,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:42:00,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:00,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-12 15:42:00,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:42:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:00,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:42:00,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:00,728 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-12 15:42:01,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:01,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:01,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:01,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776813584] [2020-10-12 15:42:01,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:01,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:42:01,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430555531] [2020-10-12 15:42:01,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:42:01,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:42:01,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:42:01,252 INFO L87 Difference]: Start difference. First operand 554 states and 742 transitions. Second operand 15 states. [2020-10-12 15:42:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:02,546 INFO L93 Difference]: Finished difference Result 695 states and 945 transitions. [2020-10-12 15:42:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:42:02,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-12 15:42:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:02,551 INFO L225 Difference]: With dead ends: 695 [2020-10-12 15:42:02,551 INFO L226 Difference]: Without dead ends: 595 [2020-10-12 15:42:02,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:42:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-12 15:42:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 588. [2020-10-12 15:42:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2020-10-12 15:42:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 782 transitions. [2020-10-12 15:42:02,609 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 782 transitions. Word has length 50 [2020-10-12 15:42:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:02,610 INFO L479 AbstractCegarLoop]: Abstraction has 588 states and 782 transitions. [2020-10-12 15:42:02,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:42:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 782 transitions. [2020-10-12 15:42:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:42:02,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:02,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:02,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 15:42:02,611 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1337587614, now seen corresponding path program 5 times [2020-10-12 15:42:02,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:02,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403428100] [2020-10-12 15:42:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:02,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:03,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:03,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:06,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:06,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:42:06,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:42:06,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4128 [2020-10-12 15:42:06,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:42:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:42:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:07,031 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-12 15:42:07,190 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-12 15:42:07,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:07,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:07,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:07,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:07,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:07,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 11 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:07,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403428100] [2020-10-12 15:42:07,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:07,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:42:07,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085993220] [2020-10-12 15:42:07,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:42:07,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:42:07,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:42:07,471 INFO L87 Difference]: Start difference. First operand 588 states and 782 transitions. Second operand 14 states. [2020-10-12 15:42:08,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:08,738 INFO L93 Difference]: Finished difference Result 759 states and 1033 transitions. [2020-10-12 15:42:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:42:08,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-12 15:42:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:08,741 INFO L225 Difference]: With dead ends: 759 [2020-10-12 15:42:08,741 INFO L226 Difference]: Without dead ends: 659 [2020-10-12 15:42:08,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:42:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-12 15:42:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 610. [2020-10-12 15:42:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-10-12 15:42:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 802 transitions. [2020-10-12 15:42:08,815 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 802 transitions. Word has length 50 [2020-10-12 15:42:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:08,816 INFO L479 AbstractCegarLoop]: Abstraction has 610 states and 802 transitions. [2020-10-12 15:42:08,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:42:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 802 transitions. [2020-10-12 15:42:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:42:08,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:08,817 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:08,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 15:42:08,817 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1060768061, now seen corresponding path program 6 times [2020-10-12 15:42:08,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:08,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967574376] [2020-10-12 15:42:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:08,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:09,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:10,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:10,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:42:10,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:42:10,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1455 [2020-10-12 15:42:10,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:10,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:42:10,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:10,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:42:10,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:10,747 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-12 15:42:10,982 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-12 15:42:11,135 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-12 15:42:11,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:11,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:11,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967574376] [2020-10-12 15:42:11,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:11,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:42:11,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175846334] [2020-10-12 15:42:11,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:42:11,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:11,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:42:11,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:42:11,505 INFO L87 Difference]: Start difference. First operand 610 states and 802 transitions. Second operand 16 states. [2020-10-12 15:42:11,962 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-12 15:42:12,404 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-12 15:42:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:13,339 INFO L93 Difference]: Finished difference Result 1032 states and 1403 transitions. [2020-10-12 15:42:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:42:13,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-12 15:42:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:13,343 INFO L225 Difference]: With dead ends: 1032 [2020-10-12 15:42:13,344 INFO L226 Difference]: Without dead ends: 841 [2020-10-12 15:42:13,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:42:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2020-10-12 15:42:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 782. [2020-10-12 15:42:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 782 states. [2020-10-12 15:42:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1033 transitions. [2020-10-12 15:42:13,414 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1033 transitions. Word has length 52 [2020-10-12 15:42:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:13,415 INFO L479 AbstractCegarLoop]: Abstraction has 782 states and 1033 transitions. [2020-10-12 15:42:13,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:42:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1033 transitions. [2020-10-12 15:42:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:42:13,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:13,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:13,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 15:42:13,416 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:13,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1003511681, now seen corresponding path program 8 times [2020-10-12 15:42:13,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:13,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113374600] [2020-10-12 15:42:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:14,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:14,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:42:14,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:42:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1485 [2020-10-12 15:42:14,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:42:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:42:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:15,256 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-12 15:42:15,473 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-12 15:42:16,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:16,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:16,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:16,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:16,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:16,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 15:42:16,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:16,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:16,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:42:16,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113374600] [2020-10-12 15:42:16,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:16,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:42:16,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228084570] [2020-10-12 15:42:16,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:42:16,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:16,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:42:16,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:42:16,066 INFO L87 Difference]: Start difference. First operand 782 states and 1033 transitions. Second operand 15 states. [2020-10-12 15:42:16,548 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-12 15:42:17,038 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-12 15:42:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:17,768 INFO L93 Difference]: Finished difference Result 823 states and 1086 transitions. [2020-10-12 15:42:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:42:17,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-12 15:42:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:17,773 INFO L225 Difference]: With dead ends: 823 [2020-10-12 15:42:17,773 INFO L226 Difference]: Without dead ends: 821 [2020-10-12 15:42:17,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:42:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2020-10-12 15:42:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 788. [2020-10-12 15:42:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 788 states. [2020-10-12 15:42:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1036 transitions. [2020-10-12 15:42:17,829 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1036 transitions. Word has length 52 [2020-10-12 15:42:17,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:17,830 INFO L479 AbstractCegarLoop]: Abstraction has 788 states and 1036 transitions. [2020-10-12 15:42:17,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:42:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1036 transitions. [2020-10-12 15:42:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:42:17,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:17,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:17,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-12 15:42:17,831 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash 129132221, now seen corresponding path program 9 times [2020-10-12 15:42:17,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:17,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490613092] [2020-10-12 15:42:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:19,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:21,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:42:22,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:22,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:42:22,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:23,143 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-12 15:42:23,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:42:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:23,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:23,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:42:23,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:42:23,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:42:23,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:42:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:42:23,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:42:23,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:42:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:42:24,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490613092] [2020-10-12 15:42:24,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:42:24,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:42:24,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814130055] [2020-10-12 15:42:24,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:42:24,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:42:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:42:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:42:24,022 INFO L87 Difference]: Start difference. First operand 788 states and 1036 transitions. Second operand 18 states. [2020-10-12 15:42:24,497 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-12 15:42:24,674 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-12 15:42:24,935 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-12 15:42:25,154 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 15:42:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:42:25,958 INFO L93 Difference]: Finished difference Result 1051 states and 1364 transitions. [2020-10-12 15:42:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:42:25,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-12 15:42:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:42:25,962 INFO L225 Difference]: With dead ends: 1051 [2020-10-12 15:42:25,962 INFO L226 Difference]: Without dead ends: 1049 [2020-10-12 15:42:25,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:42:25,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2020-10-12 15:42:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 760. [2020-10-12 15:42:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-10-12 15:42:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1004 transitions. [2020-10-12 15:42:26,020 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1004 transitions. Word has length 52 [2020-10-12 15:42:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:42:26,021 INFO L479 AbstractCegarLoop]: Abstraction has 760 states and 1004 transitions. [2020-10-12 15:42:26,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:42:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1004 transitions. [2020-10-12 15:42:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:42:26,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:42:26,022 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:42:26,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-12 15:42:26,022 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:42:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:42:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2011637633, now seen corresponding path program 6 times [2020-10-12 15:42:26,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:42:26,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205076537] [2020-10-12 15:42:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:42:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:42:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:26,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:27,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:42:30,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4453 [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:42:30,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 15:42:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0