/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:04:06,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:04:06,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:04:06,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:04:06,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:04:06,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:04:06,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:04:06,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:04:06,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:04:06,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:04:06,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:04:06,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:04:06,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:04:06,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:04:06,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:04:06,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:04:06,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:04:06,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:04:06,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:04:06,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:04:06,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:04:06,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:04:06,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:04:06,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:04:06,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:04:06,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:04:06,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:04:06,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:04:06,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:04:06,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:04:06,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:04:06,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:04:06,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:04:06,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:04:06,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:04:06,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:04:06,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:04:06,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:04:06,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:04:06,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:04:06,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:04:06,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:04:06,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:04:06,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:04:06,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:04:06,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:04:06,366 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:04:06,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:04:06,367 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:04:06,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:04:06,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:04:06,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:04:06,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:04:06,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:04:06,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:04:06,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:04:06,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:04:06,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:04:06,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:04:06,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:04:06,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:04:06,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:04:06,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:04:06,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:04:06,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:04:06,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:04:06,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:04:06,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:04:06,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:04:06,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:04:06,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:04:06,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:04:06,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:04:06,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:04:06,703 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:04:06,705 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:04:06,705 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:04:06,706 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-2.i [2020-10-14 05:04:06,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97b738c99/d2e14f9db7ce4c6295cbbe909e66bf96/FLAGea949ca48 [2020-10-14 05:04:07,254 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:04:07,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-2.i [2020-10-14 05:04:07,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97b738c99/d2e14f9db7ce4c6295cbbe909e66bf96/FLAGea949ca48 [2020-10-14 05:04:07,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97b738c99/d2e14f9db7ce4c6295cbbe909e66bf96 [2020-10-14 05:04:07,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:04:07,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:04:07,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:04:07,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:04:07,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:04:07,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:04:07" (1/1) ... [2020-10-14 05:04:07,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7100e673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:07, skipping insertion in model container [2020-10-14 05:04:07,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:04:07" (1/1) ... [2020-10-14 05:04:07,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:04:07,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:04:08,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:04:08,144 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:04:08,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:04:08,287 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:04:08,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08 WrapperNode [2020-10-14 05:04:08,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:04:08,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:04:08,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:04:08,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:04:08,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... [2020-10-14 05:04:08,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:04:08,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:04:08,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:04:08,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:04:08,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:04:08,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:04:08,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:04:08,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:04:08,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:04:08,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 05:04:08,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 05:04:08,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 05:04:08,421 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:04:08,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:04:08,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:04:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:04:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:04:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:04:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:04:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:04:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:04:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:04:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:04:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:04:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:04:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:04:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:04:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:04:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 05:04:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 05:04:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 05:04:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:04:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:04:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:04:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:04:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:04:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:04:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:04:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:04:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:04:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:04:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:04:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:04:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:04:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:04:08,430 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:04:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:04:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:04:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:04:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:04:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:04:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:04:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:04:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:04:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:04:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:04:08,434 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:04:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:04:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:04:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:04:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:04:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:04:08,438 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:04:08,439 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:04:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:04:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:04:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:04:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:04:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:04:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:04:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:04:08,443 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:04:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:04:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:04:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:04:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:04:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:04:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:04:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:04:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:04:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:04:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:04:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:04:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:04:08,816 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:04:09,018 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:04:09,019 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:04:09,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:04:09 BoogieIcfgContainer [2020-10-14 05:04:09,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:04:09,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:04:09,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:04:09,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:04:09,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:04:07" (1/3) ... [2020-10-14 05:04:09,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b819b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:04:09, skipping insertion in model container [2020-10-14 05:04:09,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:04:08" (2/3) ... [2020-10-14 05:04:09,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b819b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:04:09, skipping insertion in model container [2020-10-14 05:04:09,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:04:09" (3/3) ... [2020-10-14 05:04:09,035 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-2.i [2020-10-14 05:04:09,047 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:04:09,064 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:04:09,081 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:04:09,112 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:04:09,113 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:04:09,113 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:04:09,114 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:04:09,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:04:09,115 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:04:09,115 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:04:09,115 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:04:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-14 05:04:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:04:09,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:09,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:09,151 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-10-14 05:04:09,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:09,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012220179] [2020-10-14 05:04:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:09,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:04:09,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:04:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-10-14 05:04:09,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:09,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:04:09,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:09,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:04:09,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:09,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:09,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:09,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:09,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:04:09,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:09,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:09,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:09,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:04:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:09,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012220179] [2020-10-14 05:04:09,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:09,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:04:09,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738191171] [2020-10-14 05:04:09,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:04:09,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:09,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:04:09,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:04:09,878 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-14 05:04:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:10,002 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-10-14 05:04:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:04:10,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 05:04:10,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:10,013 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:04:10,013 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:04:10,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:04:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:04:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:04:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:04:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-14 05:04:10,058 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-10-14 05:04:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:10,059 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-14 05:04:10,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:04:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-14 05:04:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:04:10,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:10,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:10,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:04:10,061 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-10-14 05:04:10,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:10,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503228086] [2020-10-14 05:04:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:04:10,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:04:10,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-14 05:04:10,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:04:10,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:04:10,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:04:10,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:10,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:10,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:10,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:10,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:10,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:10,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:10,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 05:04:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:10,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503228086] [2020-10-14 05:04:10,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:10,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:04:10,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988521839] [2020-10-14 05:04:10,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:04:10,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:10,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:04:10,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:04:10,508 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states. [2020-10-14 05:04:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:10,634 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-10-14 05:04:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:04:10,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:04:10,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:10,636 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:04:10,636 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:04:10,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:04:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:04:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-14 05:04:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:04:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-14 05:04:10,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2020-10-14 05:04:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:10,646 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-14 05:04:10,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:04:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-14 05:04:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:04:10,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:10,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:10,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:04:10,648 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times [2020-10-14 05:04:10,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:10,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608315982] [2020-10-14 05:04:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:10,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:10,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:10,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:04:10,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:04:10,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-14 05:04:10,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:10,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:10,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:04:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:04:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:04:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:11,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:11,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:11,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:11,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:11,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:11,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608315982] [2020-10-14 05:04:11,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:11,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:04:11,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978699037] [2020-10-14 05:04:11,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:04:11,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:04:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:04:11,046 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2020-10-14 05:04:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:11,151 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-10-14 05:04:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:04:11,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 05:04:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:11,155 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:04:11,155 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:04:11,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:04:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:04:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-14 05:04:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:04:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-14 05:04:11,165 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20 [2020-10-14 05:04:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:11,165 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-14 05:04:11,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:04:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-14 05:04:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:04:11,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:11,167 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:11,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:04:11,167 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:11,167 INFO L82 PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times [2020-10-14 05:04:11,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:11,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550682987] [2020-10-14 05:04:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:04:11,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-14 05:04:11,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:04:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:11,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:04:11,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:11,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:11,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:11,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:11,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:11,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:04:11,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550682987] [2020-10-14 05:04:11,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:11,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:04:11,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052585403] [2020-10-14 05:04:11,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:04:11,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:11,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:04:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:04:11,288 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 5 states. [2020-10-14 05:04:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:11,383 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-10-14 05:04:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:04:11,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 05:04:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:11,385 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:04:11,385 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:04:11,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:04:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:04:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-14 05:04:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:04:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-10-14 05:04:11,393 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21 [2020-10-14 05:04:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:11,394 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-10-14 05:04:11,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:04:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-10-14 05:04:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:04:11,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:11,395 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:11,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:04:11,395 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-10-14 05:04:11,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:11,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904216532] [2020-10-14 05:04:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:04:11,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-14 05:04:11,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:04:11,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:04:11,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:04:11,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:11,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:11,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:11,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:11,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:11,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:11,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:11,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:11,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:11,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:11,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:11,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904216532] [2020-10-14 05:04:11,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:11,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:04:11,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099564184] [2020-10-14 05:04:11,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:04:11,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:04:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:04:11,806 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 11 states. [2020-10-14 05:04:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:12,143 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-10-14 05:04:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:04:12,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-14 05:04:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:12,146 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:04:12,147 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:04:12,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:04:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2020-10-14 05:04:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:04:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-10-14 05:04:12,162 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 27 [2020-10-14 05:04:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:12,162 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-10-14 05:04:12,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:04:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-10-14 05:04:12,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:04:12,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:12,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:12,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:04:12,164 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1963063202, now seen corresponding path program 1 times [2020-10-14 05:04:12,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:12,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133203431] [2020-10-14 05:04:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:04:12,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-14 05:04:12,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:04:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:04:12,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:12,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:12,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:12,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:12,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:12,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:12,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:04:12,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133203431] [2020-10-14 05:04:12,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:12,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:04:12,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281343760] [2020-10-14 05:04:12,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:04:12,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:12,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:04:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:04:12,285 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 4 states. [2020-10-14 05:04:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:12,403 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2020-10-14 05:04:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:04:12,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-14 05:04:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:12,407 INFO L225 Difference]: With dead ends: 106 [2020-10-14 05:04:12,407 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 05:04:12,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:04:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 05:04:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-10-14 05:04:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:04:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-14 05:04:12,427 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 27 [2020-10-14 05:04:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:12,430 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-14 05:04:12,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:04:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-14 05:04:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 05:04:12,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:12,433 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:12,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:04:12,433 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1592893925, now seen corresponding path program 1 times [2020-10-14 05:04:12,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:12,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18708550] [2020-10-14 05:04:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:04:12,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-14 05:04:12,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:04:12,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:04:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:04:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:12,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:12,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:12,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:12,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:12,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:12,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:04:12,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:12,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:12,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:12,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:04:12,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18708550] [2020-10-14 05:04:12,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:12,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:04:12,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405304446] [2020-10-14 05:04:12,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:04:12,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:04:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:04:12,896 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2020-10-14 05:04:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:13,161 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-14 05:04:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:04:13,162 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 05:04:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:13,163 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:04:13,164 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:04:13,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:04:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:04:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-14 05:04:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:04:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-14 05:04:13,182 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 29 [2020-10-14 05:04:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:13,186 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-14 05:04:13,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:04:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-14 05:04:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:04:13,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:13,189 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:13,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:04:13,189 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:13,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:13,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1278392056, now seen corresponding path program 2 times [2020-10-14 05:04:13,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:13,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276523192] [2020-10-14 05:04:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:13,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:13,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:13,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:04:13,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:13,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-14 05:04:13,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:13,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:04:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:04:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:04:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:13,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:13,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:13,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:13,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:13,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:13,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:13,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:04:13,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276523192] [2020-10-14 05:04:13,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:04:13,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:04:13,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487281763] [2020-10-14 05:04:13,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:04:13,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:04:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:04:13,686 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 4 states. [2020-10-14 05:04:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:13,790 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2020-10-14 05:04:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:04:13,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-14 05:04:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:13,791 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:04:13,791 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:04:13,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:04:13,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:04:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2020-10-14 05:04:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:04:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-10-14 05:04:13,805 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 30 [2020-10-14 05:04:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:13,806 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-10-14 05:04:13,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:04:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-10-14 05:04:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:04:13,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:13,808 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:13,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:04:13,811 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 496615306, now seen corresponding path program 1 times [2020-10-14 05:04:13,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:13,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359574979] [2020-10-14 05:04:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:13,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:14,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:14,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:04:14,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:14,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-14 05:04:14,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:14,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:14,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:14,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:14,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:04:14,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:14,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:14,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:14,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:14,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:14,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:14,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:14,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:14,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:14,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:14,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:14,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:14,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:14,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359574979] [2020-10-14 05:04:14,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:14,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:14,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024071838] [2020-10-14 05:04:14,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:14,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:14,863 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 16 states. [2020-10-14 05:04:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:15,297 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-14 05:04:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:04:15,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-14 05:04:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:15,299 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:04:15,299 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:04:15,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:04:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-14 05:04:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:04:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-14 05:04:15,309 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 30 [2020-10-14 05:04:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:15,309 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-14 05:04:15,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-14 05:04:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:04:15,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:15,311 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:15,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:04:15,311 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash 504264639, now seen corresponding path program 1 times [2020-10-14 05:04:15,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:15,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248128206] [2020-10-14 05:04:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:15,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:15,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:15,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:16,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:16,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:04:16,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:04:16,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1318 [2020-10-14 05:04:16,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:16,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:04:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:16,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:04:16,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:16,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:16,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:16,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:16,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:16,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:16,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 05:04:16,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:16,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:16,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:16,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:16,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:04:16,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248128206] [2020-10-14 05:04:16,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:16,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:04:16,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85310487] [2020-10-14 05:04:16,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:04:16,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:04:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:04:16,745 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 7 states. [2020-10-14 05:04:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:16,929 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-14 05:04:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:04:16,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-14 05:04:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:16,931 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:04:16,931 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:04:16,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:04:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:04:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2020-10-14 05:04:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:04:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-14 05:04:16,946 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 32 [2020-10-14 05:04:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:16,946 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-14 05:04:16,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:04:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-14 05:04:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:04:16,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:16,949 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:16,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:04:16,949 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash 505974661, now seen corresponding path program 1 times [2020-10-14 05:04:16,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:16,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975160924] [2020-10-14 05:04:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:16,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:17,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:04:17,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:17,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-14 05:04:17,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:17,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:17,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:04:17,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 05:04:17,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:04:17,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:17,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:17,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:17,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:17,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:17,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:17,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:17,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:17,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:17,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:17,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:04:17,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975160924] [2020-10-14 05:04:17,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:17,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:04:17,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552303596] [2020-10-14 05:04:17,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:04:17,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:04:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:04:17,823 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 8 states. [2020-10-14 05:04:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:18,054 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2020-10-14 05:04:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:04:18,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-14 05:04:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:18,057 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:04:18,057 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:04:18,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:04:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:04:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2020-10-14 05:04:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:04:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-10-14 05:04:18,075 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 32 [2020-10-14 05:04:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:18,075 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-10-14 05:04:18,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:04:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-10-14 05:04:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:04:18,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:18,076 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:18,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:04:18,077 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash -637975330, now seen corresponding path program 2 times [2020-10-14 05:04:18,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:18,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964604508] [2020-10-14 05:04:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:18,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:18,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:04:18,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:18,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-14 05:04:18,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:18,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:04:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:18,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:04:18,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:18,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:18,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:18,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:18,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:18,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:18,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:18,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:18,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:18,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:18,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:04:18,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964604508] [2020-10-14 05:04:18,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:18,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:04:18,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635087902] [2020-10-14 05:04:18,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:04:18,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:18,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:04:18,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:04:18,566 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 12 states. [2020-10-14 05:04:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:19,017 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-14 05:04:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:04:19,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-14 05:04:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:19,019 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:04:19,019 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:04:19,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:04:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2020-10-14 05:04:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:04:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-14 05:04:19,027 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 33 [2020-10-14 05:04:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:19,028 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-14 05:04:19,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:04:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-14 05:04:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 05:04:19,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:19,029 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:19,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:04:19,030 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash 748997879, now seen corresponding path program 1 times [2020-10-14 05:04:19,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:19,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12760522] [2020-10-14 05:04:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:19,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:20,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:20,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 05:04:20,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:20,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-14 05:04:20,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:20,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:20,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:04:20,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:20,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:04:20,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:20,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:20,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:20,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:20,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:20,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:20,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:20,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:20,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:20,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12760522] [2020-10-14 05:04:20,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:20,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:04:20,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611409279] [2020-10-14 05:04:20,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:04:20,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:20,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:04:20,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:04:20,615 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 15 states. [2020-10-14 05:04:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:21,204 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-14 05:04:21,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:04:21,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-14 05:04:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:21,206 INFO L225 Difference]: With dead ends: 82 [2020-10-14 05:04:21,206 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:04:21,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:04:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:04:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-14 05:04:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:04:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-10-14 05:04:21,215 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 33 [2020-10-14 05:04:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:21,216 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-10-14 05:04:21,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:04:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-10-14 05:04:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:04:21,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:21,217 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:21,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:04:21,217 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:21,217 INFO L82 PathProgramCache]: Analyzing trace with hash -621471021, now seen corresponding path program 1 times [2020-10-14 05:04:21,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:21,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472515373] [2020-10-14 05:04:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:21,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:04:21,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-14 05:04:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:21,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:04:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:04:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:22,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:22,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:22,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:22,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:22,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:22,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:22,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:22,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:22,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472515373] [2020-10-14 05:04:22,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:22,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:22,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950169869] [2020-10-14 05:04:22,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:22,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:22,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:22,083 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 18 states. [2020-10-14 05:04:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:23,067 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2020-10-14 05:04:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:04:23,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-14 05:04:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:23,069 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:04:23,069 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:04:23,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:04:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:04:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2020-10-14 05:04:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 05:04:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-14 05:04:23,075 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 36 [2020-10-14 05:04:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:23,076 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-14 05:04:23,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-14 05:04:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:04:23,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:23,077 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:23,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:04:23,077 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2076362507, now seen corresponding path program 2 times [2020-10-14 05:04:23,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:23,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528669842] [2020-10-14 05:04:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:23,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:23,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:04:23,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:23,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-14 05:04:23,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:23,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:04:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:23,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:04:23,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:24,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:24,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:24,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:24,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:24,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:04:24,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:24,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:24,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:24,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:24,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528669842] [2020-10-14 05:04:24,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:24,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:04:24,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806010304] [2020-10-14 05:04:24,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:04:24,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:04:24,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:04:24,077 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 16 states. [2020-10-14 05:04:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:24,959 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2020-10-14 05:04:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:24,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-14 05:04:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:24,960 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:04:24,960 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:04:24,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:04:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:04:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-14 05:04:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:04:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-14 05:04:24,968 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 39 [2020-10-14 05:04:24,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:24,968 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-14 05:04:24,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:04:24,968 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-14 05:04:24,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:04:24,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:24,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:24,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:04:24,969 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:24,970 INFO L82 PathProgramCache]: Analyzing trace with hash -731659325, now seen corresponding path program 1 times [2020-10-14 05:04:24,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:24,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931583223] [2020-10-14 05:04:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:24,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:25,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:04:25,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:25,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-14 05:04:25,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:25,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:04:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:04:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:25,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:25,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:25,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:25,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:25,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:25,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:25,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:25,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:25,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:25,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:04:25,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931583223] [2020-10-14 05:04:25,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:25,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:04:25,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597607570] [2020-10-14 05:04:25,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:04:25,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:25,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:04:25,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:25,894 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 18 states. [2020-10-14 05:04:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:26,752 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-14 05:04:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:04:26,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 05:04:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:26,753 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:04:26,753 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 05:04:26,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 05:04:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-14 05:04:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:04:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-14 05:04:26,761 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 40 [2020-10-14 05:04:26,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:26,761 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-14 05:04:26,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:04:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-14 05:04:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:04:26,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:26,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:26,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:04:26,763 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1250078526, now seen corresponding path program 1 times [2020-10-14 05:04:26,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:26,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151843809] [2020-10-14 05:04:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:04:26,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-14 05:04:26,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:04:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 05:04:26,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:04:26,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:26,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:26,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:26,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:26,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:26,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:26,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:26,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:26,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 05:04:26,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151843809] [2020-10-14 05:04:26,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:26,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:04:26,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28008704] [2020-10-14 05:04:26,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:04:26,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:26,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:04:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:04:26,994 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 7 states. [2020-10-14 05:04:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:27,127 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-14 05:04:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:04:27,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-14 05:04:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:27,128 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:04:27,128 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:04:27,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:04:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:04:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-14 05:04:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:04:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-14 05:04:27,136 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 42 [2020-10-14 05:04:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:27,137 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-14 05:04:27,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:04:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-14 05:04:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:04:27,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:27,139 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:27,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:04:27,139 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:27,140 INFO L82 PathProgramCache]: Analyzing trace with hash -855225014, now seen corresponding path program 3 times [2020-10-14 05:04:27,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:27,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007203678] [2020-10-14 05:04:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:28,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:28,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:04:28,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:28,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 871 [2020-10-14 05:04:28,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:28,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:28,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:04:28,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:28,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:04:28,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:28,383 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-14 05:04:29,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:29,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:29,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:29,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:29,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:29,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:29,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:29,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:29,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:29,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007203678] [2020-10-14 05:04:29,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:29,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:04:29,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649505831] [2020-10-14 05:04:29,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:04:29,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:04:29,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:04:29,079 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 22 states. [2020-10-14 05:04:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:30,796 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-10-14 05:04:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:04:30,797 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-10-14 05:04:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:30,798 INFO L225 Difference]: With dead ends: 111 [2020-10-14 05:04:30,798 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:04:30,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:04:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:04:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-10-14 05:04:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:04:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-10-14 05:04:30,808 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 45 [2020-10-14 05:04:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:30,809 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-10-14 05:04:30,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:04:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-10-14 05:04:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:04:30,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:30,809 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:30,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:04:30,810 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1531102706, now seen corresponding path program 2 times [2020-10-14 05:04:30,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:30,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502375925] [2020-10-14 05:04:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:30,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:31,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:32,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:32,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:04:32,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:32,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1937 [2020-10-14 05:04:32,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:32,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:04:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:04:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:33,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:33,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:33,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:33,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:04:33,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502375925] [2020-10-14 05:04:33,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:33,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:04:33,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394303422] [2020-10-14 05:04:33,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:04:33,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:04:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:04:33,406 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 21 states. [2020-10-14 05:04:34,333 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-14 05:04:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:35,313 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-10-14 05:04:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:04:35,314 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 05:04:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:35,315 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:04:35,315 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:04:35,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:04:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:04:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-10-14 05:04:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:04:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-14 05:04:35,327 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 46 [2020-10-14 05:04:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:35,328 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-14 05:04:35,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:04:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-14 05:04:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:04:35,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:35,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:35,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:04:35,330 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:35,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1534159489, now seen corresponding path program 1 times [2020-10-14 05:04:35,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:35,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178669519] [2020-10-14 05:04:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:35,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:38,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:38,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:04:38,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:04:38,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2764 [2020-10-14 05:04:38,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:38,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:38,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:04:38,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:04:38,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:38,699 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-14 05:04:39,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:39,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:39,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:39,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:39,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:39,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:04:39,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:39,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:39,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:39,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:39,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:39,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:39,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178669519] [2020-10-14 05:04:39,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:39,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:04:39,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041363935] [2020-10-14 05:04:39,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:04:39,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:04:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:39,230 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 23 states. [2020-10-14 05:04:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:40,406 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2020-10-14 05:04:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:04:40,407 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-14 05:04:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:40,408 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:04:40,408 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 05:04:40,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:04:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 05:04:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2020-10-14 05:04:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 05:04:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-14 05:04:40,426 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 47 [2020-10-14 05:04:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:40,427 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-14 05:04:40,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:04:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-14 05:04:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:04:40,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:40,428 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:40,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:04:40,428 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:40,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:40,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1532449467, now seen corresponding path program 1 times [2020-10-14 05:04:40,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:40,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983759967] [2020-10-14 05:04:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:40,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:41,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-14 05:04:41,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:41,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:04:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:04:41,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:42,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:42,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:42,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:42,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983759967] [2020-10-14 05:04:42,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:42,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:04:42,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665068149] [2020-10-14 05:04:42,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:04:42,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:04:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:04:42,620 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 23 states. [2020-10-14 05:04:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:43,646 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-14 05:04:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:04:43,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-10-14 05:04:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:43,648 INFO L225 Difference]: With dead ends: 111 [2020-10-14 05:04:43,648 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:04:43,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:04:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:04:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-10-14 05:04:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 05:04:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-14 05:04:43,658 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 47 [2020-10-14 05:04:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:43,659 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-14 05:04:43,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:04:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-14 05:04:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:04:43,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:43,659 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:43,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:04:43,660 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1924573792, now seen corresponding path program 4 times [2020-10-14 05:04:43,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:43,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094001771] [2020-10-14 05:04:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:43,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:44,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:44,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:04:44,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:04:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-10-14 05:04:44,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:44,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:04:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:04:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:45,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:45,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:45,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:45,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:45,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:04:45,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094001771] [2020-10-14 05:04:45,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:45,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:04:45,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107481316] [2020-10-14 05:04:45,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:04:45,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:45,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:04:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:04:45,985 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 24 states. [2020-10-14 05:04:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:48,198 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-14 05:04:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:04:48,200 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-14 05:04:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:48,201 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:04:48,201 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 05:04:48,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:04:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 05:04:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-14 05:04:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-14 05:04:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-10-14 05:04:48,218 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 48 [2020-10-14 05:04:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:48,219 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-10-14 05:04:48,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:04:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-10-14 05:04:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:04:48,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:48,220 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:48,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:04:48,220 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1153433094, now seen corresponding path program 1 times [2020-10-14 05:04:48,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:48,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138252494] [2020-10-14 05:04:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:48,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:49,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:49,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:53,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:04:53,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:04:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 05:04:53,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:53,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:04:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 05:04:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:04:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:04:53,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:53,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:53,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:53,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:53,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:53,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:53,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:53,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:53,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:53,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:53,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:53,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:04:53,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138252494] [2020-10-14 05:04:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:53,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:04:53,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392363987] [2020-10-14 05:04:53,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:04:53,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:04:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:04:53,592 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 11 states. [2020-10-14 05:04:54,044 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-14 05:04:54,309 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-14 05:04:54,550 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-14 05:04:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:54,708 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2020-10-14 05:04:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:04:54,708 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-10-14 05:04:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:54,709 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:04:54,710 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 05:04:54,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:04:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 05:04:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2020-10-14 05:04:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 05:04:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2020-10-14 05:04:54,721 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 49 [2020-10-14 05:04:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:54,722 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2020-10-14 05:04:54,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:04:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2020-10-14 05:04:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:04:54,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:54,722 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:54,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:04:54,723 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:54,723 INFO L82 PathProgramCache]: Analyzing trace with hash 488170170, now seen corresponding path program 3 times [2020-10-14 05:04:54,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:54,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774816899] [2020-10-14 05:04:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:54,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:54,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:54,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:56,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:57,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2315 [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:04:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:04:57,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:04:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:57,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:04:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:57,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:57,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:04:57,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:04:57,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:04:57,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:57,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:57,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:04:57,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:04:57,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:04:57,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:04:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 05:04:57,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774816899] [2020-10-14 05:04:57,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:04:57,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:04:57,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236610513] [2020-10-14 05:04:57,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:04:57,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:04:57,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:04:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:04:57,138 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand 9 states. [2020-10-14 05:04:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:04:57,532 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2020-10-14 05:04:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:04:57,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-10-14 05:04:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:04:57,535 INFO L225 Difference]: With dead ends: 125 [2020-10-14 05:04:57,535 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 05:04:57,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:04:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 05:04:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-10-14 05:04:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 05:04:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-10-14 05:04:57,555 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 49 [2020-10-14 05:04:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:04:57,556 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-10-14 05:04:57,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:04:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-10-14 05:04:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:04:57,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:04:57,563 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:04:57,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:04:57,563 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:04:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:04:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash 489880192, now seen corresponding path program 2 times [2020-10-14 05:04:57,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:04:57,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807211985] [2020-10-14 05:04:57,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:04:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:04:57,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:57,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:58,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:59,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:04:59,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:04:59,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:04:59,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:04:59,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2309 [2020-10-14 05:04:59,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:04:59,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:04:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:04:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 05:04:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:04:59,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:00,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:00,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:00,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:00,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:05:00,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807211985] [2020-10-14 05:05:00,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:00,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:05:00,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977516748] [2020-10-14 05:05:00,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:05:00,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:00,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:05:00,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:05:00,149 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 12 states. [2020-10-14 05:05:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:00,832 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2020-10-14 05:05:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:05:00,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-14 05:05:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:00,834 INFO L225 Difference]: With dead ends: 124 [2020-10-14 05:05:00,834 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 05:05:00,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:05:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 05:05:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2020-10-14 05:05:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:05:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-10-14 05:05:00,847 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 49 [2020-10-14 05:05:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:00,848 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-10-14 05:05:00,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:05:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-10-14 05:05:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:05:00,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:00,848 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:00,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:05:00,849 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1613815893, now seen corresponding path program 2 times [2020-10-14 05:05:00,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:00,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064242022] [2020-10-14 05:05:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:00,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:02,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:02,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:05:02,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:02,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1754 [2020-10-14 05:05:02,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:02,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:05:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:05:02,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:03,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:03,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:03,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:03,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:03,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:03,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:05:03,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:03,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:03,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:03,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:03,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:03,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:05:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:05:03,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064242022] [2020-10-14 05:05:03,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:03,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:05:03,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330191741] [2020-10-14 05:05:03,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:05:03,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:05:03,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:05:03,168 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 18 states. [2020-10-14 05:05:03,774 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-14 05:05:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:04,870 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-14 05:05:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:05:04,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-14 05:05:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:04,871 INFO L225 Difference]: With dead ends: 136 [2020-10-14 05:05:04,871 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:05:04,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:05:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:05:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-14 05:05:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 05:05:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-10-14 05:05:04,885 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 50 [2020-10-14 05:05:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:04,885 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-10-14 05:05:04,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:05:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-10-14 05:05:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:05:04,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:04,886 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:04,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:05:04,886 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1615525915, now seen corresponding path program 3 times [2020-10-14 05:05:04,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:04,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269101049] [2020-10-14 05:05:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:05,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:06,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:06,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:05:06,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:06,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-14 05:05:06,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:06,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:05:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:06,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:05:06,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:07,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:07,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:07,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:07,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:07,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269101049] [2020-10-14 05:05:07,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:07,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:07,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782948533] [2020-10-14 05:05:07,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:07,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:07,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:07,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:07,951 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 25 states. [2020-10-14 05:05:08,184 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-14 05:05:08,852 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-10-14 05:05:09,129 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2020-10-14 05:05:09,586 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-10-14 05:05:09,908 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 05:05:10,612 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-14 05:05:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:11,662 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2020-10-14 05:05:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:05:11,662 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-14 05:05:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:11,663 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:05:11,664 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 05:05:11,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=281, Invalid=2475, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:05:11,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 05:05:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2020-10-14 05:05:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:05:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-10-14 05:05:11,687 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 50 [2020-10-14 05:05:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:11,687 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-10-14 05:05:11,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-10-14 05:05:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:05:11,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:11,688 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:11,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:05:11,689 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:11,689 INFO L82 PathProgramCache]: Analyzing trace with hash -601624824, now seen corresponding path program 5 times [2020-10-14 05:05:11,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:11,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074965096] [2020-10-14 05:05:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:11,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:12,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:12,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:05:12,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-14 05:05:12,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:12,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:05:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:12,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:05:12,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:13,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:13,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:13,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:13,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:13,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:05:13,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074965096] [2020-10-14 05:05:13,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:13,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:05:13,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938416953] [2020-10-14 05:05:13,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:05:13,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:13,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:05:13,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:05:13,400 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 22 states. [2020-10-14 05:05:14,591 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2020-10-14 05:05:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:15,566 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-10-14 05:05:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:05:15,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-14 05:05:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:15,568 INFO L225 Difference]: With dead ends: 126 [2020-10-14 05:05:15,568 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:05:15,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:05:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:05:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-10-14 05:05:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:05:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-10-14 05:05:15,583 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 51 [2020-10-14 05:05:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:15,583 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-10-14 05:05:15,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:05:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-10-14 05:05:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:05:15,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:15,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:15,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:05:15,585 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1673212619, now seen corresponding path program 4 times [2020-10-14 05:05:15,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:15,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147813541] [2020-10-14 05:05:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:16,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:16,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:05:16,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:16,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-10-14 05:05:16,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:16,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:16,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:05:16,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:16,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:05:16,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:17,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:17,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:05:17,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147813541] [2020-10-14 05:05:17,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:17,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:05:17,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051529924] [2020-10-14 05:05:17,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:05:17,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:17,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:05:17,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:05:17,120 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 23 states. [2020-10-14 05:05:18,211 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2020-10-14 05:05:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:19,252 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-10-14 05:05:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:05:19,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-10-14 05:05:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:19,254 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:05:19,254 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:05:19,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:05:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:05:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2020-10-14 05:05:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 05:05:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-10-14 05:05:19,268 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 51 [2020-10-14 05:05:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:19,268 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-10-14 05:05:19,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:05:19,269 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-10-14 05:05:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:05:19,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:19,269 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, 1, 1, 1, 1, 1] [2020-10-14 05:05:19,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:05:19,270 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:19,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:19,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1671502597, now seen corresponding path program 4 times [2020-10-14 05:05:19,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:19,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751454773] [2020-10-14 05:05:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:19,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:21,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:21,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1744 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:05:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:21,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:21,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 05:05:21,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751454773] [2020-10-14 05:05:21,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:21,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:05:21,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111881857] [2020-10-14 05:05:21,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:05:21,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:05:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:05:21,341 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 13 states. [2020-10-14 05:05:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:22,124 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2020-10-14 05:05:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:05:22,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-14 05:05:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:22,127 INFO L225 Difference]: With dead ends: 127 [2020-10-14 05:05:22,127 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 05:05:22,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:05:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 05:05:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2020-10-14 05:05:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:05:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2020-10-14 05:05:22,141 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 51 [2020-10-14 05:05:22,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:22,141 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2020-10-14 05:05:22,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:05:22,141 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2020-10-14 05:05:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:05:22,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:22,142 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:22,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:05:22,143 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:22,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1132117919, now seen corresponding path program 6 times [2020-10-14 05:05:22,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:22,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287813926] [2020-10-14 05:05:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:22,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:23,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:23,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:05:23,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-14 05:05:23,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:23,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:05:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:23,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:05:23,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:23,989 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-14 05:05:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:24,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:24,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:24,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:25,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287813926] [2020-10-14 05:05:25,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:25,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:25,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068838625] [2020-10-14 05:05:25,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:25,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:25,009 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 25 states. [2020-10-14 05:05:25,935 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2020-10-14 05:05:26,942 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-14 05:05:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:27,622 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2020-10-14 05:05:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:05:27,623 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-14 05:05:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:27,624 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:05:27,624 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 05:05:27,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=295, Invalid=2255, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:05:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 05:05:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2020-10-14 05:05:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:05:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2020-10-14 05:05:27,641 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 51 [2020-10-14 05:05:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:27,641 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2020-10-14 05:05:27,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2020-10-14 05:05:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:05:27,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:27,642 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:27,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:05:27,642 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1524848169, now seen corresponding path program 5 times [2020-10-14 05:05:27,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:27,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101057546] [2020-10-14 05:05:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:27,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:27,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:29,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:05:29,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:30,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:30,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:30,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:30,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:30,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:30,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:30,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:30,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:30,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:30,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:30,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:30,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:05:30,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101057546] [2020-10-14 05:05:30,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:30,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:05:30,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814889056] [2020-10-14 05:05:30,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:05:30,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:30,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:05:30,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:05:30,349 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 21 states. [2020-10-14 05:05:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:31,416 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2020-10-14 05:05:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:05:31,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-14 05:05:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:31,419 INFO L225 Difference]: With dead ends: 130 [2020-10-14 05:05:31,419 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 05:05:31,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:05:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 05:05:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-14 05:05:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:05:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2020-10-14 05:05:31,440 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 52 [2020-10-14 05:05:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:31,441 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2020-10-14 05:05:31,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:05:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2020-10-14 05:05:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:05:31,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:31,443 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:31,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:05:31,444 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1639504848, now seen corresponding path program 2 times [2020-10-14 05:05:31,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:31,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402520302] [2020-10-14 05:05:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:31,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:31,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:32,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:34,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:34,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:05:34,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2866 [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:05:34,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:34,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:34,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:34,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:34,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:34,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:34,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:34,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:34,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:34,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:34,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-14 05:05:34,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402520302] [2020-10-14 05:05:34,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:34,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:05:34,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144707372] [2020-10-14 05:05:34,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:05:34,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:05:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:05:34,605 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand 12 states. [2020-10-14 05:05:35,225 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-14 05:05:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:35,357 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-14 05:05:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:05:35,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-14 05:05:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:35,359 INFO L225 Difference]: With dead ends: 140 [2020-10-14 05:05:35,359 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 05:05:35,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:05:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 05:05:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2020-10-14 05:05:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:05:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-10-14 05:05:35,374 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 53 [2020-10-14 05:05:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:35,375 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-10-14 05:05:35,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:05:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-10-14 05:05:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:05:35,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:35,376 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:35,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:05:35,376 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1340268842, now seen corresponding path program 3 times [2020-10-14 05:05:35,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:35,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007237967] [2020-10-14 05:05:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:35,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:35,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:36,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:36,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3898 [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:05:39,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:39,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:05:39,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:40,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:40,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:40,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:40,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007237967] [2020-10-14 05:05:40,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:40,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:05:40,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197514627] [2020-10-14 05:05:40,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:05:40,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:40,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:05:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:05:40,286 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 24 states. [2020-10-14 05:05:40,864 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2020-10-14 05:05:41,007 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-10-14 05:05:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:42,121 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-14 05:05:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:05:42,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-14 05:05:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:42,123 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:05:42,123 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 05:05:42,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:05:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 05:05:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2020-10-14 05:05:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:05:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-14 05:05:42,135 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 53 [2020-10-14 05:05:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:42,135 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-14 05:05:42,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:05:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-14 05:05:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:05:42,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:42,136 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:42,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:05:42,136 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1338558820, now seen corresponding path program 5 times [2020-10-14 05:05:42,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:42,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027401511] [2020-10-14 05:05:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:42,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:44,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:44,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:05:44,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2006 [2020-10-14 05:05:44,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:44,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:05:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:44,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:05:44,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:45,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:45,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:45,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:45,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:45,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:45,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:45,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:45,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:45,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:45,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:05:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:45,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027401511] [2020-10-14 05:05:45,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:45,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:45,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495226936] [2020-10-14 05:05:45,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:45,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:45,408 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 25 states. [2020-10-14 05:05:46,202 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-14 05:05:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:47,431 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2020-10-14 05:05:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:05:47,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2020-10-14 05:05:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:47,434 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:05:47,434 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 05:05:47,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:05:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 05:05:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-10-14 05:05:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:05:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-14 05:05:47,443 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 53 [2020-10-14 05:05:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:47,443 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-14 05:05:47,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-14 05:05:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:05:47,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:47,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:47,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:05:47,444 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:47,445 INFO L82 PathProgramCache]: Analyzing trace with hash -208931031, now seen corresponding path program 7 times [2020-10-14 05:05:47,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:47,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147670786] [2020-10-14 05:05:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:48,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:48,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:05:48,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:48,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-14 05:05:48,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:48,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:05:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:05:48,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:49,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:49,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:49,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:49,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:49,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:49,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:49,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147670786] [2020-10-14 05:05:49,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:49,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:05:49,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439402607] [2020-10-14 05:05:49,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:05:49,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:05:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:05:49,768 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 26 states. [2020-10-14 05:05:50,365 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-14 05:05:50,522 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-14 05:05:50,889 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-14 05:05:51,159 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2020-10-14 05:05:51,497 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-14 05:05:52,199 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-14 05:05:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:52,871 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-14 05:05:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:05:52,872 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-14 05:05:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:52,873 INFO L225 Difference]: With dead ends: 111 [2020-10-14 05:05:52,873 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:05:52,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=253, Invalid=2099, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:05:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:05:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2020-10-14 05:05:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:05:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-14 05:05:52,886 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 54 [2020-10-14 05:05:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:52,886 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-14 05:05:52,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:05:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-14 05:05:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:05:52,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:52,887 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:52,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:05:52,887 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:52,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1079067550, now seen corresponding path program 4 times [2020-10-14 05:05:52,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:52,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181876740] [2020-10-14 05:05:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:52,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:54,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:54,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:05:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:05:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-10-14 05:05:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:54,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:05:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:05:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:05:54,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:55,431 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-14 05:05:55,567 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-14 05:05:56,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:05:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:56,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:05:56,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:05:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:05:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:05:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:05:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:05:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181876740] [2020-10-14 05:05:56,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:05:56,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:05:56,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251478020] [2020-10-14 05:05:56,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:05:56,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:05:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:05:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:05:56,390 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 25 states. [2020-10-14 05:05:57,215 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-14 05:05:57,553 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-14 05:05:57,760 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-14 05:05:58,048 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-14 05:05:58,404 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-14 05:05:58,749 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-14 05:05:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:05:59,770 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2020-10-14 05:05:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:05:59,771 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 05:05:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:05:59,772 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:05:59,772 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 05:05:59,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:05:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 05:05:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-10-14 05:05:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 05:05:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2020-10-14 05:05:59,784 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 56 [2020-10-14 05:05:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:05:59,785 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2020-10-14 05:05:59,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:05:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2020-10-14 05:05:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:05:59,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:05:59,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:05:59,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:05:59,786 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:05:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:05:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1080777572, now seen corresponding path program 6 times [2020-10-14 05:05:59,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:05:59,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956983136] [2020-10-14 05:05:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:05:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:05:59,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:01,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:06:01,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:06:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:01,820 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-14 05:06:02,039 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-14 05:06:02,201 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-14 05:06:02,393 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-14 05:06:03,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:03,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:03,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:03,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:03,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:03,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:03,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956983136] [2020-10-14 05:06:03,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:03,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:06:03,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290187869] [2020-10-14 05:06:03,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:06:03,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:06:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:06:03,484 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 27 states. [2020-10-14 05:06:04,180 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-14 05:06:04,591 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-14 05:06:04,761 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-14 05:06:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:05,694 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2020-10-14 05:06:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:06:05,694 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-14 05:06:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:05,695 INFO L225 Difference]: With dead ends: 115 [2020-10-14 05:06:05,696 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 05:06:05,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:06:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 05:06:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2020-10-14 05:06:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 05:06:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2020-10-14 05:06:05,710 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 56 [2020-10-14 05:06:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:05,710 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2020-10-14 05:06:05,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:06:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2020-10-14 05:06:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:06:05,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:05,711 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:05,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:06:05,711 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1045727, now seen corresponding path program 8 times [2020-10-14 05:06:05,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:05,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440955849] [2020-10-14 05:06:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:05,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:06,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:06,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:06:06,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:06,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-14 05:06:06,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:06,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:06:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:06,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:06:06,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:07,866 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-14 05:06:08,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:08,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:08,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:08,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:08,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440955849] [2020-10-14 05:06:08,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:08,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:06:08,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874663949] [2020-10-14 05:06:08,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:06:08,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:06:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:06:08,332 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand 24 states. [2020-10-14 05:06:08,595 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-14 05:06:09,101 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-10-14 05:06:09,309 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-14 05:06:10,101 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2020-10-14 05:06:10,288 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-14 05:06:10,820 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-14 05:06:11,024 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 05:06:11,438 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-14 05:06:11,640 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-14 05:06:11,816 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-14 05:06:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:12,288 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-14 05:06:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:06:12,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-14 05:06:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:12,289 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:06:12,289 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 05:06:12,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:06:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 05:06:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2020-10-14 05:06:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 05:06:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-10-14 05:06:12,304 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 57 [2020-10-14 05:06:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:12,304 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-10-14 05:06:12,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:06:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-10-14 05:06:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 05:06:12,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:12,305 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:12,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:06:12,306 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:12,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:12,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1275990966, now seen corresponding path program 9 times [2020-10-14 05:06:12,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:12,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432825324] [2020-10-14 05:06:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:13,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:13,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:06:13,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:14,522 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-14 05:06:15,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:15,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:15,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:15,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:15,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432825324] [2020-10-14 05:06:15,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:15,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:06:15,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817013686] [2020-10-14 05:06:15,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:06:15,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:06:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:06:15,439 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 28 states. [2020-10-14 05:06:16,420 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2020-10-14 05:06:16,579 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-14 05:06:16,859 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-14 05:06:17,163 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-14 05:06:17,444 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-14 05:06:17,832 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-14 05:06:18,257 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-14 05:06:18,495 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-14 05:06:18,822 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-14 05:06:19,072 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-14 05:06:19,293 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-14 05:06:19,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:19,569 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2020-10-14 05:06:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:06:19,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-10-14 05:06:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:19,571 INFO L225 Difference]: With dead ends: 134 [2020-10-14 05:06:19,571 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 05:06:19,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=329, Invalid=2221, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:06:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 05:06:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-10-14 05:06:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:06:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-10-14 05:06:19,588 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 57 [2020-10-14 05:06:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:19,588 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-10-14 05:06:19,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:06:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-10-14 05:06:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:06:19,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:19,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:19,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:06:19,589 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1896850521, now seen corresponding path program 2 times [2020-10-14 05:06:19,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:19,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252353238] [2020-10-14 05:06:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:19,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:20,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:21,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:21,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1934 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:06:21,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:21,929 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-14 05:06:22,084 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-14 05:06:22,435 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-14 05:06:22,650 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-14 05:06:23,098 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-14 05:06:24,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:24,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:24,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:24,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:24,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:24,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:24,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:24,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252353238] [2020-10-14 05:06:24,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:24,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:06:24,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467913022] [2020-10-14 05:06:24,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:06:24,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:06:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:06:24,051 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 28 states. [2020-10-14 05:06:25,273 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2020-10-14 05:06:25,484 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2020-10-14 05:06:25,848 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-14 05:06:26,305 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-14 05:06:26,670 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-10-14 05:06:26,995 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 53 [2020-10-14 05:06:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:28,484 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2020-10-14 05:06:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:06:28,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-10-14 05:06:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:28,486 INFO L225 Difference]: With dead ends: 139 [2020-10-14 05:06:28,486 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 05:06:28,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:06:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 05:06:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2020-10-14 05:06:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:06:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2020-10-14 05:06:28,505 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 58 [2020-10-14 05:06:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:28,506 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2020-10-14 05:06:28,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:06:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2020-10-14 05:06:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:06:28,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:28,507 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:28,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:06:28,507 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -754803489, now seen corresponding path program 7 times [2020-10-14 05:06:28,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:28,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520604472] [2020-10-14 05:06:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:30,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:30,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:06:30,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1878 [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:06:30,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:31,503 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-14 05:06:31,974 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-14 05:06:32,319 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-14 05:06:32,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:32,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:32,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:32,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:32,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:32,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:32,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:32,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:32,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:32,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:32,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:32,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:32,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520604472] [2020-10-14 05:06:32,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:32,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:06:32,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106764159] [2020-10-14 05:06:32,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:06:32,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:06:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:06:32,640 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 26 states. [2020-10-14 05:06:32,912 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-14 05:06:33,446 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-14 05:06:33,724 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-14 05:06:33,917 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-14 05:06:34,477 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-14 05:06:34,959 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2020-10-14 05:06:35,199 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-14 05:06:35,625 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2020-10-14 05:06:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:36,585 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-14 05:06:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:06:36,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 05:06:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:36,587 INFO L225 Difference]: With dead ends: 140 [2020-10-14 05:06:36,588 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 05:06:36,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:06:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 05:06:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2020-10-14 05:06:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 05:06:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2020-10-14 05:06:36,610 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 58 [2020-10-14 05:06:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:36,610 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2020-10-14 05:06:36,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:06:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2020-10-14 05:06:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:06:36,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:36,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:36,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:06:36,611 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1807270484, now seen corresponding path program 3 times [2020-10-14 05:06:36,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:36,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405237640] [2020-10-14 05:06:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:37,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:38,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:40,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:41,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:41,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:41,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:06:41,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:06:41,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:06:41,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:41,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:06:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 05:06:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:06:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:42,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:42,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-14 05:06:42,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405237640] [2020-10-14 05:06:42,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:42,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:06:42,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126200426] [2020-10-14 05:06:42,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:06:42,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:06:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:06:42,262 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand 14 states. [2020-10-14 05:06:42,817 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-14 05:06:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:43,619 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-10-14 05:06:43,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:06:43,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-14 05:06:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:43,622 INFO L225 Difference]: With dead ends: 154 [2020-10-14 05:06:43,622 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 05:06:43,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:06:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 05:06:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2020-10-14 05:06:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 05:06:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2020-10-14 05:06:43,647 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 60 [2020-10-14 05:06:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:43,647 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2020-10-14 05:06:43,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:06:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2020-10-14 05:06:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:06:43,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:43,648 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:43,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:06:43,648 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash 924116916, now seen corresponding path program 10 times [2020-10-14 05:06:43,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:43,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222853920] [2020-10-14 05:06:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:43,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:44,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2385 [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:46,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:06:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:06:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:06:46,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:46,784 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-14 05:06:46,965 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-14 05:06:48,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:48,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:48,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:48,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:48,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:48,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:48,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:48,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:06:48,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222853920] [2020-10-14 05:06:48,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:48,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:06:48,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073416899] [2020-10-14 05:06:48,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:06:48,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:48,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:06:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:06:48,054 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand 30 states. [2020-10-14 05:06:48,899 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-10-14 05:06:49,172 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 05:06:49,558 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-14 05:06:50,068 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-14 05:06:50,482 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-10-14 05:06:51,094 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-14 05:06:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:51,246 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-14 05:06:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:06:51,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 60 [2020-10-14 05:06:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:51,248 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:06:51,248 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 05:06:51,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:06:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 05:06:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2020-10-14 05:06:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 05:06:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2020-10-14 05:06:51,271 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 60 [2020-10-14 05:06:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:51,271 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2020-10-14 05:06:51,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:06:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2020-10-14 05:06:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:06:51,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:51,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:51,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:06:51,273 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1620200847, now seen corresponding path program 4 times [2020-10-14 05:06:51,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:51,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587170639] [2020-10-14 05:06:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:51,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:52,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:53,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:54,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:56,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:56,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:06:56,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 05:06:56,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:06:56,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:56,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:56,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:06:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 05:06:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:06:56,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:06:56,868 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-10-14 05:06:57,200 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 29 [2020-10-14 05:06:57,560 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-10-14 05:06:57,911 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-10-14 05:06:58,119 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 26 [2020-10-14 05:06:58,349 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2020-10-14 05:06:58,477 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-10-14 05:06:58,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:06:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:58,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:06:58,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:06:58,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:06:58,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:06:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:06:58,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:06:58,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:06:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:06:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:06:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:06:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:06:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-14 05:06:58,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587170639] [2020-10-14 05:06:58,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:06:58,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:06:58,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660776860] [2020-10-14 05:06:58,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:06:58,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:06:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:06:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:06:58,687 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand 15 states. [2020-10-14 05:06:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:06:59,699 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2020-10-14 05:06:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:06:59,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-10-14 05:06:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:06:59,702 INFO L225 Difference]: With dead ends: 128 [2020-10-14 05:06:59,702 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 05:06:59,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:06:59,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 05:06:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2020-10-14 05:06:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:06:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2020-10-14 05:06:59,720 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 62 [2020-10-14 05:06:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:06:59,721 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2020-10-14 05:06:59,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:06:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2020-10-14 05:06:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:06:59,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:06:59,721 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:06:59,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:06:59,722 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:06:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:06:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash -983548567, now seen corresponding path program 5 times [2020-10-14 05:06:59,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:06:59,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002037116] [2020-10-14 05:06:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:06:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:06:59,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4579 [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:07:04,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:04,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:07:04,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:04,949 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-14 05:07:05,310 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-14 05:07:06,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:06,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:06,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:06,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:06,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:06,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002037116] [2020-10-14 05:07:06,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:06,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:07:06,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592485192] [2020-10-14 05:07:06,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:07:06,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:06,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:07:06,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:07:06,479 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand 28 states. [2020-10-14 05:07:07,268 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-14 05:07:07,470 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 05:07:07,740 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-14 05:07:08,078 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-14 05:07:08,459 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-10-14 05:07:08,897 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 05:07:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:10,294 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2020-10-14 05:07:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:07:10,295 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 05:07:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:10,296 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:07:10,296 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 05:07:10,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=313, Invalid=2767, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:07:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 05:07:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 147. [2020-10-14 05:07:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:07:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2020-10-14 05:07:10,326 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 62 [2020-10-14 05:07:10,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:10,326 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2020-10-14 05:07:10,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:07:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2020-10-14 05:07:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:07:10,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:10,327 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:10,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:07:10,327 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash -981838545, now seen corresponding path program 8 times [2020-10-14 05:07:10,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:10,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050351221] [2020-10-14 05:07:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:10,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:11,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3896 [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:14,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:07:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:07:14,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:14,892 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-14 05:07:15,150 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-14 05:07:15,547 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-14 05:07:16,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:16,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:16,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:16,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:16,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:16,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:16,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:07:16,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050351221] [2020-10-14 05:07:16,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:16,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:07:16,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795004824] [2020-10-14 05:07:16,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:07:16,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:16,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:07:16,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:07:16,396 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand 28 states. [2020-10-14 05:07:16,626 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-14 05:07:17,104 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-14 05:07:17,295 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 05:07:17,717 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2020-10-14 05:07:18,021 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-14 05:07:18,384 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-14 05:07:18,926 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-14 05:07:19,854 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 05:07:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:19,997 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2020-10-14 05:07:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:07:19,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 05:07:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:19,998 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:07:19,998 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 05:07:19,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=243, Invalid=2109, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:07:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 05:07:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2020-10-14 05:07:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 05:07:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2020-10-14 05:07:20,021 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 62 [2020-10-14 05:07:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:20,021 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2020-10-14 05:07:20,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:07:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2020-10-14 05:07:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 05:07:20,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:20,022 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:20,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:07:20,022 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:20,022 INFO L82 PathProgramCache]: Analyzing trace with hash 484455540, now seen corresponding path program 11 times [2020-10-14 05:07:20,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:20,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535625119] [2020-10-14 05:07:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:21,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:21,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 05:07:21,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:21,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-14 05:07:21,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:21,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:21,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:07:21,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:21,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:07:21,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:21,968 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-14 05:07:22,216 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-14 05:07:22,522 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-14 05:07:22,756 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-14 05:07:22,935 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-14 05:07:23,136 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-14 05:07:23,318 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-14 05:07:23,604 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-14 05:07:23,832 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-14 05:07:24,020 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-14 05:07:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:24,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:24,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:24,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:24,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:24,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:24,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:24,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:24,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:24,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:24,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535625119] [2020-10-14 05:07:24,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:24,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:07:24,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261650496] [2020-10-14 05:07:24,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:07:24,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:24,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:07:24,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:07:24,717 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand 30 states. [2020-10-14 05:07:25,667 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 54 [2020-10-14 05:07:25,864 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 45 [2020-10-14 05:07:26,051 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-14 05:07:26,281 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-14 05:07:26,719 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 65 [2020-10-14 05:07:27,120 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 82 [2020-10-14 05:07:27,552 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 73 [2020-10-14 05:07:27,938 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-14 05:07:28,172 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-14 05:07:28,637 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 56 [2020-10-14 05:07:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:30,385 INFO L93 Difference]: Finished difference Result 182 states and 210 transitions. [2020-10-14 05:07:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:07:30,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2020-10-14 05:07:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:30,388 INFO L225 Difference]: With dead ends: 182 [2020-10-14 05:07:30,388 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 05:07:30,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=343, Invalid=2963, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:07:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 05:07:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2020-10-14 05:07:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 05:07:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2020-10-14 05:07:30,417 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 63 [2020-10-14 05:07:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:30,418 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2020-10-14 05:07:30,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:07:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2020-10-14 05:07:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:07:30,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:30,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:30,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:07:30,419 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2060061174, now seen corresponding path program 5 times [2020-10-14 05:07:30,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:30,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119390881] [2020-10-14 05:07:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:30,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:31,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:32,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:32,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:32,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:33,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:35,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:35,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:35,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:07:35,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:07:35,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:35,882 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 23 [2020-10-14 05:07:36,210 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-14 05:07:36,465 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-14 05:07:36,659 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-14 05:07:36,907 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2020-10-14 05:07:37,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:37,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:37,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:37,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:37,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:37,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:37,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:37,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-14 05:07:37,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119390881] [2020-10-14 05:07:37,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:37,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:07:37,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940651342] [2020-10-14 05:07:37,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:07:37,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:07:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:07:37,287 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand 16 states. [2020-10-14 05:07:37,690 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-14 05:07:37,839 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-14 05:07:38,597 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-14 05:07:38,919 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-14 05:07:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:38,961 INFO L93 Difference]: Finished difference Result 168 states and 189 transitions. [2020-10-14 05:07:38,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:07:38,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-14 05:07:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:38,963 INFO L225 Difference]: With dead ends: 168 [2020-10-14 05:07:38,963 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 05:07:38,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:07:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 05:07:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-10-14 05:07:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 05:07:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2020-10-14 05:07:38,983 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 64 [2020-10-14 05:07:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:38,983 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2020-10-14 05:07:38,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:07:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2020-10-14 05:07:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:07:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:38,984 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:38,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:07:38,984 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash -297314460, now seen corresponding path program 6 times [2020-10-14 05:07:38,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:38,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809139468] [2020-10-14 05:07:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:39,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:39,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:44,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:44,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:07:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:44,917 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-14 05:07:46,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:07:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:46,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:46,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:07:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:07:46,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:07:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:07:46,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809139468] [2020-10-14 05:07:46,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:07:46,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:07:46,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127638066] [2020-10-14 05:07:46,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:07:46,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:07:46,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:07:46,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:07:46,142 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 31 states. [2020-10-14 05:07:46,996 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2020-10-14 05:07:47,252 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-10-14 05:07:47,468 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-14 05:07:47,801 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-10-14 05:07:48,005 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-14 05:07:48,227 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-14 05:07:48,722 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-14 05:07:48,988 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-14 05:07:49,374 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-10-14 05:07:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:07:49,980 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2020-10-14 05:07:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:07:49,981 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 64 [2020-10-14 05:07:49,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:07:49,982 INFO L225 Difference]: With dead ends: 139 [2020-10-14 05:07:49,983 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 05:07:49,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=282, Invalid=2580, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:07:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 05:07:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2020-10-14 05:07:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:07:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2020-10-14 05:07:50,007 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 64 [2020-10-14 05:07:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:07:50,008 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2020-10-14 05:07:50,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:07:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2020-10-14 05:07:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:07:50,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:07:50,009 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:07:50,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:07:50,009 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:07:50,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:07:50,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1345998826, now seen corresponding path program 9 times [2020-10-14 05:07:50,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:07:50,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303588371] [2020-10-14 05:07:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:07:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:07:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:07:51,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking...